GMW 3359 Non-Electrolytically Applied Zinc Rich Coating 2-1-14

WORLDWIDEENGINEERING STANDARDS Material Specification GMW3359 1 Scope This standard covers the basic requirements for a corrosion resistant non-electrolytically applied zincrich coating. Besides corrosion protection, the coating also provides consistent frictional properties. 1.1 Material Description. This coating specification covers zinc flake coating with or without a top coat. Coating Types: Three levels of corrosion protection are provided by the following types: Type A: High corrosion resistant coating. Type B: Medium corrosion resistant coating. Type C: Low corrosion resistant coating. Note: When not explicitly specified, the default coating type shall be Type A. Parts contracted and Production Part Approval Processed (“PPAPed”) before January 1, 2014, that is without the coating Type (A, B, or C) specified, may continue to default to Type B. Note: Type C coating systems may be without top coat if coefficient of friction (CoF) requirements are met. Treatment with an additional lubricant to meet CoF is permissible. 1.2 Symbols. Not applicable. 1.3 Applicability. This coating is suitable for externally and internally threaded fasteners size M6 or larger, and other ferrous parts where high level of corrosion protection and freedom from hydrogen embrittlement are required. This coating is not recommended for the following types of parts:  Bolts and nuts of sizes < M6.  Parts with internal drive recess and blind holes.  Parts mating against magnesium surfaces.  Loose washers of all sizes.  Parts where electrical conductivity is required. 1.4 Remarks. 1.4.1 This coating process does not generate hydrogen; however, pre-treatment processes, i.e., acid pickling could cause hydrogen adsorption. Non-electrolytically applied zinc-rich coating has high permeability which allows effusion of hydrogen during curing which might have been absorbed during acid pickling. See precautions in Section 3.1.1. 1.4.2 Use of this coating system on threaded surface and/or bearing surface of joints could affect the torque-tension relationship. It is recommended that a torque-tension study of the fastener joint be performed before releasing this finish on any new application. 1.4.3 The corrosion performance is influenced by part geometry, substrate material, and application process. The coating systems approved to this specification were tested to meet all requirements using common steel fasteners. For new designs, applications, and parts with complex geometries or difficult to clean material such as castings and powder metal, extra validation testing is highly recommended. 1.4.4 This finish is suitable for service temperatures from -50 °C to +120 °C. Applications outside of this temperature range shall be reviewed with the responsible Materials Engineering organization before usage. 1.4.5 Dip-spin coating is a bulk process. If parts are prone to nesting, stick together (flat washers), or easily damaged by mechanical tumbling, dipspin coating method is not recommended. Alternatives include spray and dip-drain methods. 1.4.6 Shot blasting is not a preferred pre-treatment method for internally threaded parts (nuts), nutwasher and bolt-washer assemblies. If shot blasting is used, extra care shall be taken to ensure shots are not trapped in the coated parts. 1.4.7 This coating is relatively soft, and is prone to “dusting”. It is expected that equipment handling high volumes of coated parts (such as automated bolt feeders) will require regular cleaning to remove the coating dust. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. © Copyright 2014 General Motors Company All Rights Reserved February 2014 Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Page 1 of 9 Licensee=Flex-n-Gate LLC 2,3,5,8,14,15/5940544004, User=Mirasolo, Shannon Not for Resale, 05/29/2014 12:20:48 MDT --`,``,```,```,,,`,``,,``,`````-`-`,,`,,`,`,,`--- Non-Electrolytically Applied Zinc-Rich Coating Note that treatment is determined by the maximum measured hardness of the lot.``. the color shall be silver or gray.4. perform tape adhesion test per GMW14829. After removal from humidity exposure for at least 10 minutes. not the average..1 Parts coated to this specification shall show no evidence of blistering or other appearance changes other than a whitish blush after humidity exposure per GMW14729 for 96 h.0% coating (top coat) retention. new applicator approval.2 GM Standards/Specifications.`--- GM WORLDWIDE ENGINEERING STANDARDS . coat 50 mm x 50 mm steel panels with the parts and use the panels for the test. M10 heavy hex bolts. If the production part geometry or size is not suitable for this test. 3. 3.2 The curing temperature of the coating process shall not exceed the maximum of 400 °C.  GM Part Number 11515490.  GM Part Number (P/N) 11502644.3. TMC003 Material Safety Data Sheet guidance documents (available at www. The maximum material hardness in the drawing or relevant specification shall be used to determine if de-embrittlement treatment is required.``. and regular process control testing. 3.0% coating (top coat and base coat) retention.1 External Standards/Specifications.com). flexing and compression encountered by springs and spring clips during product assembly without evidence of flaking or loss of adhesion from the base metal. If a part is heavily cold worked or heat treated to high strength/hardness.`. surrogate bolt. The appropriate tests for different situations: New chemical approval. 3. a slight adherence of the coating is permissible since this has no influence on the corrosion resistance. © Copyright 2014 General Motors Company All Rights Reserved February 2014 Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Page 2 of 9 Licensee=Flex-n-Gate LLC 2.`.1.3 Flexibility and Chip Resistance. 3. expose the same parts to Neutral Salt Spry (NSS) per 3.2.6. Test at room temperature. 3. The coating shall not be oily or tacky to the touch. Unless otherwise specified. surrogate parts may be coated with the production parts and used for adhesion testing.5.15/5940544004. but is without a specified maximum hardness limit in the drawing or specification.. Electrodeposition Primer (ELPO) coated test washer. There shall be a minimum of 99. The referee method for detection of embrittlement shall be per SAE/USCAR-7.8.  GM P/N 11516105.`````-`-`. For hardened parts. are described in Appendix A. 3.1..14.```. The coating must withstand the normal extension.  GM P/N 11516090. Procedures and requirements for new chemical and applicator approval are described in Appendix B. AIAG CQI-12 ISO 1463 ISO 9227 ISO 16047 ISO 17025 SAE/USCAR-5 SAE/USCAR-7 SAE/USCAR-11 2. User=Mirasolo. then the part manufacturer must provide to the applicator the hardness data in order GMW3359 to determine if de-embrittlement treatment is required. Production Part Approval Process (PPAP).1 Expose coated part per GMW14700. It shall withstand normal handling and storage conditions without chipping or flaking.1 Pre-treatment and Post-treatment. 9984094 9985670 9985809 9986153 9986333 GMW3059 GMW14700 GMW14729 GMW14829 GMW14872 GMW16551 GMW16730 2.3 Additional References. 3. In the case of small parts with insufficient surface area for the tape adhesion test.`.4 Adhesion Characteristics.``. There shall be a minimum of 99.4. When removing the tape. 3. After exposure per GMW14700. The coating shall have a uniform appearance and shall be free from uncoated areas and excess coating which affect appearance and performance.6.2 Appearance. method C. This is to reduce the risk of tempering or other softening conditions to hardened parts.1 All coated parts with surface or core hardness greater than 320 HV (32 HRc). Parts shall meet the corrosion performance requirements per 3.```. test nut...  GM P/N 11570102. special consideration shall be made to ensure the mechanical properties are not detrimentally affected by the coating process.. test washer.2 For each production lot.`. 3 Requirements The parts coated to this specification shall meet the following technical requirements and demonstrated by the test methods described. and processed through an acidic or hydrogengenerating pre-treatment process shall be processed per SAE/USCAR-5. Shannon Not for Resale.gmsupplypower.3. 05/29/2014 12:20:48 MDT --`. perform tape adhesion test per GMW14829 on finished coated parts. The coating shall be completely cured and shall have good adhesion to base metal. metal and wood products. Type Minimum Coating Thickness (µm) Hours to 5% White Corrosion (h) Hours to Red Rust (h) A 12 240 720 B 12 144 480 C 6 72 240 3. The maximum allowable torque for gauging can be found in GMW16551.6 Corrosion Resistance. On nuts.5. handling. The minimum coating thicknesses for the different coating types (A/B/C) are listed in Table 1.`````-`-`. parts must gage with appropriate basic size GO thread gage. and the readings by non-destructive test.  The placement and orientation of test parts shall be such that parts are not touching.5.``.6. 3. Threads may be produced undersize/oversize to accommodate the coating.6 For parts other than threaded fasteners.. Neutral Salt Spray (NSS).`...```. 05/29/2014 12:20:48 MDT . i.5. 3.5.5.4.14.1 thru 3. and all undersizing/oversizing shall be within agreed upon limits.`.7 The applicator may use a non-destructive method to measure the total or base coat thickness for process quality control or lot release. After extended transportation. and © Copyright 2014 General Motors Company All Rights Reserved February 2014 Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Page 3 of 9 Licensee=Flex-n-Gate LLC 2. coated parts shall show a maximum of 5% white corrosion products and no base metal corrosion (red rust) on significant surfaces. the coating thickness shall be measured on the spanner flats. The fastener supplier will consult with the coating applicator to determine the appropriate thread size before coating. If the significant surfaces are not defined.3. 3. or it was already exposed to a corrosion test). In cases when it is not possible to accurately measure the coating thickness on the head (e.g.``.8 For referee purposes. It is up to the Tier 1 supplier to arrange the proper logistics with GM to ensure the parts meet performance when they reach GM assembly.6.```.5 Coating Thickness. 3. Also. 3. must be established for each coating type and thickness measurement equipment.  The orientation of the parts during test is slightly slanted to minimize accumulation of test solution on the part surface. the sample holder material shall not affect the corrosion test results. i. Table 1: Minimum Coating Thickness and Salt Spray Test Performance Requirements. acrylic and Polyvinyl Chloride (PVC). GMW3359 Note: Coating thickness derived from coating weight measurements is not acceptable for lot release or other official reporting purposes.6. After coating. the maximum coating thickness is limited by the basic thread size (tolerance h or H).8.5.. as long as the finish meets all other requirements and does not negatively affect the function of the part. then all surfaces are considered significant. The test method and definition of significant surfaces are described in 3.`.e. provided that the finished fastener meets all specified mechanical properties. the coating thickness shall be determined by microscopic examination of cross sections taken perpendicular to significant surfaces per ISO 1463. Note: The corrosion protection performance described here is applicable to the finished product as it is packaged and leaves the applicator.e. the untouched surface of the fastener tip may be measured and compared to a reference part coated in the same process. undersizing/oversizing is subject to approval by the pertinent GM Fastener Engineer..5..``. the coating thickness requirement applies to significant surfaces as specified on engineering drawings. After exposure to neutral salt spray (NSS) for the hours specified in Table 1. a documented correlation with the total coating thickness.GM WORLDWIDE ENGINEERING STANDARDS --`.2 The coating thickness on bolts and screws shall be measured on the head.3 For parts other than threaded fasteners.1 Test finished parts per ISO 9227 (NSS) with the following additional requirements:  The sample holder inside the test cabinet/chamber shall be constructed of material resistant to the test environment. 3.5. there is no limit on maximum total coating thickness.. 3. Shannon Not for Resale. the coating is mechanically damaged. and storage.`--- 3.5. 3. 3.. measured by microscopic test per ISO 1463.1 The coating thickness is defined as the combined base coat and top coat after the entire coating and curing process is completed.4 For threaded fasteners. Where mechanical properties are not specified. User=Mirasolo.5 The maximum coating thickness under the head of bolts and screws shall not exceed 25 µm. However. the corrosion performance and other characteristics may deteriorate.15/5940544004..`. 3 Significant surfaces on parts other than threaded fasteners shall be all surfaces except deep recesses such as blind holes and the interior of tubes unless otherwise specified on the drawing.10. Exposure D. Method 1/2/3.0 mm minimum thick. After 96 h of NSS exposure.1 Torque Tension.`````-`-`. AA6063T52 aluminum). 3.``.10.  Parts shall be aged at the ambient laboratory conditions (23 °C ± 5 °C and relative humidity of 45% ± 10%) for at least 24 h before the test.`--- Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Licensee=Flex-n-Gate LLC 2. Tension load shall be 24 kN.6. Note: The salt spray test is only used to test the integrity of the finish for quality control and comparison to other parts with the same finish. 3.  Commercial grade DOT 4 brake fluid.1 shall still be met.3. Metric threaded fasteners M6 and larger shall be subject to torque-tension monitoring thru the use of surrogate M10 x 1. © Copyright 2014 General Motors Company All Rights Reserved February 2014 Page 4 of 9 --`. 4s.. 4s. Exposure C.```.  Test nut P/N 11516090.8.  Use the following GM Part Numbers (P/N):  Surrogate bolt P/N 11516105. No special cleaning or treatments allowed. 3. Shannon Not for Resale.``.5. 3. Special M10 heavy hex bolts (P/N 11570102 or equivalent) shall be tested per SAE/USCAR-11 with the following requirements:  Tightening speed shall be 30 rpm ± 3 rpm.6.`.4 After heating the finished parts for 3 h at 150 °C (part temperature).  Test washer P/N 11502644.5 test bolts.`. 10.  Test shall be conducted with Electrodeposition Primer (ELPO) coated test washers (11515490 except unhardened and coated with 9984094.7 Cyclic Corrosion Test. including but not limited to the head. Expose coated parts per GMW14872:  Type A: EXT All. Method 1/2/3. User=Mirasolo..6.3. there shall be no red rust inside of the scratch... 3. the coating shall not blister or show any signs of softening or dulling. Fastener threads and point are excluded unless otherwise specified on the drawing.5 mm ± 0.6. 3.2 and 3.10.50 hole size. 3.```.  The tests shall be frequently run to maintain statistical quality control. SEMS washers and external surface of nuts. After exposure.2 Significant surfaces for test evaluation of fasteners shall be all exposed surfaces when installed.3 kN.  Engine oil (SAE 5W30 or equivalent). Ten (10) surrogate bolts shall be processed with the production parts and tested as follows:  Use test procedure SAE/USCAR-11. gasoline (except  Commercial E100 Ethanol (except exposure time of only 2h)..`.1. Exposure C.  Parts to be tested shall be as close to "asshipped" condition as possible. the scratch having a width of 0. 1/5s. medium build ELPO) and aluminum test washers (3. Type C: INT Low. except tightening speed shall be 30 rpm ± 3 rpm and tension at 28. GMW3359 3.`. the corrosion resistance requirements as specified in 3. 3.6.GM WORLDWIDE ENGINEERING STANDARDS they are not shielding each other from the test environment.  Test parts shall not drip on each other during the test.15/5940544004.  Type B: EXT All.6.6.5 NSS testing shall be performed in-house as part of the applicator’s process control plan to ensure that parts meet the corrosion resistance requirements consistently.  Wind shield washer fluid (9985670). The hours to white or red corrosion products shall not be construed as having any correlation to the actual service life of the part.10 Friction Control.  50% mixture of potable water and extended life coolant (9985809).1 mm.  Commercial grade E10 exposure time of only 2 h).9 Chemical Resistance.8 Cathodic Protection. The cathodic protection capability of the coating shall be tested by NSS exposure per ISO 9227 with a sample that is scratched to the base metal. Method 1/2/3. socket recess.  The Six Sigma torque range must be within 48 Nm ± 8 Nm.14. 3..10. per GMW16730 Section 3. 05/29/2014 12:20:48 MDT . After exposure. 3.  Test nut shall be P/N 11516090.3 Bearing Surface Characteristics.``. there shall be no red rust on significant surfaces as defined in 3.  Transmission fluid (9986333 or 9986153).2 CoF testing.25 to 10. Coated parts shall be immersed in the following automotive fluids for 24 h at 23 °C ± 2 °C. using the coated production parts is the recommended alternative to surrogate part testing. ``. location of manufacture. The applicator shall keep the certificates for a minimum of five (5) years. chemicals. A new approval must be received for any changes. The equipment. e. If not otherwise agreed.15/5940544004. all testing and documentation normally required for initial release must be completed. The applicator may supply this certificate after delivery of the lot. a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-specific MSDS/SDS requirements.`````-`-`. bolts and screws with captive washers (SEMS). All materials must satisfy applicable laws.`---  Part number. but must do so within six (6) months. manufacturing process.g. 5.3 Inspection and Rejection. the English language shall take precedence. If not otherwise agreed.. and to include documentation of all modifications of materials and/or processes and to apply for a new release.1 Legal Regulations. all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. 4. 5. after pre-treatment (shot blasting or phosphating). In addition. GMW3359 5 Rules and Regulations 5.`. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). 4 Manufacturing Process 4. 6 Approved Sources Materials and applicators supplied to this specification must be approved by General Motors Materials Engineering. properties.2 Language.3. In individual cases. coating.. without solicitation..  Applicator name and address. 5..1 The GM-approved process.GM WORLDWIDE ENGINEERING STANDARDS  The Six Sigma torque range shall be within 35 Nm to 52 Nm for ten (10) samples tested for the ELPO and aluminum bearing surface. Shannon Not for Resale. parts must be kept clean and free of rust until coating. This includes using dedicated clean containers. It is the responsibility of the supplier to inform the customer in a timely manner.    --`.5 All materials supplied to this standard must comply with the requirements of GMW3059. 05/29/2014 12:20:48 MDT .  Coating system used. including pretreatment (cleaning). User=Mirasolo..2 To avoid poor coating quality due to corrosion and contamination. Total coating thickness range (minimum and maximum) for at least three (3) finished parts. and appropriate storage/staging to minimize exposure to dust and dirt. These operations cannot deviate without prior approval by GM Materials Engineering. Restricted and Reportable Substances for Parts.14.``. or equivalent equipment to minimize excess coating and recess fill. For each production lot of coated parts.3 Internally threaded parts (nuts). regulations and recommendations valid in the country of usage.  These tests are required for the initial approval of the finish material.`. rules. For new product submissions. and post-treatment shall be performed by one (1) company in one (1) facility. or when a change in chemical composition of an existing product has occurred. process controls. a shorter test can be agreed to between the responsible Engineering department and the supplier. and location used must remain the same for regular production.. 4. Parts must be coated within a time limit after pre-treatment.```. planetary-type basket system. etc. © Copyright 2014 General Motors Company All Rights Reserved February 2014 Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Page 5 of 9 Licensee=Flex-n-Gate LLC 2.`.`.``.5. Date(s) the parts were coated.8.```. This time limit depends on the plant environment (temperature and humidity) and shall be no more than 48 h.. and parts with recessed features shall be coated in a canting centrifuge (tilt-tumbling basket). In the event of conflict between the English and domestic language. product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material specification and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. the applicator shall supply a certificate to their customer with the following information: This specification number. This includes pretreatment (such as cleaning) and post-treatment. 1. 3.`````-`-`.4.1..`. 1. 7.`.`--- A list of approved materials and applicators can be found in the GM Approved Finishers List. that batch is no longer considered one (1) production lot for that process.`.8..6.1 Glossary. 9 Release and Revisions This standard was originated in October 1999. 3. Shannon Not for Resale.3.4 (ff). 2 DEC 2000 Format revision. then the testing requirements affected (e. if a batch of parts undergo the processes on different days or on different machines. If approved material already listed is used.```. base coat.1. and top coat may be applied on separate days.3. the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval.3. 3. Example: If the top coat for a batch of parts were applied on two (2) different days (not continuously on consecutive shifts). GMW3359 . complete revision of wording 1. drawings. revised 2. It was first approved in February 2000.3.2 Acronyms.5 and 7 and added 3.3. (GMNA) 3 OCT 2004 Rewrote in new GMW template.5.3.3.. 3. It was first published in June 2000.  The batch is processed together on one (1) machine and in one (1) continuous run. User=Mirasolo.```.`.1. Issue Publication Date Description (Organization) 1 JUN 2000 Initial publication. contact Materials Engineering for details on the approval process. and supplied as one (1) lot from the customer.15/5940544004.3. 3.1. Abbreviations. While the pre-treatment. 1.3.8. 3. 05/29/2014 12:20:48 MDT --`..``. 1.2 and 3... 3. Production Lot: A batch of coated parts are considered one (1) production lot when the following criteria are met:  A batch of parts consisting of one (1) part number. (GMW Finish Team) 4 SEP 2007 Added 1..6. (GM Finish Team) 5 FEB 2014 Complete revision.3. and Symbols.3.10.11 bolt changed. μm micrometer AIAG Automotive Industry Action Group CoF Coefficient of Friction ELPO Electrodeposition Primer GHS Globally Harmonized System of Classification and Labeling of Chemicals HRc Hardness Rockwell C scale MSDS Material Safety Data Sheet NSS P/N PFMEA PPAP PVC rpm SDS Neutral Salt Spray Part Number Process Failure Mode Effect Analysis Production Part Approval Process Polyvinyl Chloride revolutions per minute Safety Data Sheet 8 Coding System This standard shall be referenced in other documents.``.GM WORLDWIDE ENGINEERING STANDARDS 7 Notes 7.1.5. 3.7.4.3.14. etc..3. This GM Material File is provided to third parties to reduce redundant testing of materials.1.``. 2. coating thickness) must be performed for each of the two (2) top coat days.7.3 (ff). 1. Added new coating types. 3. 3. If the decision is made to use a not yet approved material.g.2. (Finishes & Coatings Global Subsystem Leadership Team) © Copyright 2014 General Motors Company All Rights Reserved February 2014 Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Page 6 of 9 Licensee=Flex-n-Gate LLC 2.2. as follows: Material (Coating) per GMW3359 Type (A/B/C) (Optional: black) Example: Coating per GMW3359 Type C black. The material approval process must be completed prior to PPAP start date of the part supplied to General Motors. 3. 3.5. 15/5940544004. Note 5: Use a rotation of in-house production parts for NSS testing. Note 4: Use actual production part..``.9 Chemical Resistance  3. 05/29/2014 12:20:48 MDT .```.`.4 only required for new chemical approval...7 Cyclic Corrosion Test  3.`. Note 2: Other than for Chemical and Applicator approval..8.. Note 3: Temperature resistance test per 3. User=Mirasolo.``. a visual check and statement indicating conformance is sufficient.6.10.8 Cathodic Protection  3.5 Coating Thickness      Note 3  Note 4 Note 5    3.3 Flexibility and Chip Resistance  3.4 Adhesion Characteristics     3. © Copyright 2014 General Motors Company All Rights Reserved February 2014 Page 7 of 9 --`. Shannon Not for Resale.1 Pre-treatment and Post-treatment 3.10. Note 6: Use production parts per 3.GM WORLDWIDE ENGINEERING STANDARDS GMW3359 Appendix A The following table describes the testing requirements for various material and parts approval process. No surrogates allowed..`--- Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Licensee=Flex-n-Gate LLC 2.2 Appearance Control Plan Note 1 Not applicable  Note 2 PPAP Note 1    3.3.14. Table A1: Testing Requirements Chemical Approval Requirements Applicator Approval 3.2 or surrogate parts per Section 3.10 Friction Control Note 6  Note 1: Production parts shall be used unless surrogates are explicitly allowed.5.```.6 Corrosion Resistance (NSS) 3.`.``.1.`````-`-`.`. Submit all tested samples along with official reports. 3.  Past experience and quality issues  Applicator must have capability for CoF/TT testing currently and have two (2) years plans for capability of independently measuring thread and underhead bearing friction per ISO 16047. control plan.  Technical capability. However.  All testing must be performed by independent ISO 17025 accredited laboratory unless otherwise authorized by GM.  Local demand for applicators.5.. B.1 Submit a brief outline of process equipment capability – shot blasting.  Applicator must conform to AIAG CQI-12. some testing may be abbreviated if the coating system and application process for Type A/B and C are identical.``.15/5940544004.``.`.`---  Type A. 3. spin speed. along with Automotive Industry Action Group (AIAG) format process flow diagram. New chemical and applicator test requirements: Test samples must be coated on a regular production line with the intended chemistry running for a minimum of three (3) months unless otherwise agreed upon by GM responsible Materials Engineer. type and size of parts capability.  For new chemical systems. © Copyright 2014 General Motors Company All Rights Reserved February 2014 Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Page 8 of 9 Licensee=Flex-n-Gate LLC 2.`````-`-`.  All after-test samples must be submitted together for review. 3.`.  Applicator approvals are valid for five (5) years after which they may be renewed following review of quality history and optional sample testing. it is important to plan ahead. and Process Failure Mode Effect Analysis (PFMEA) documents. and transportation through the curing oven must be automated. phosphate line. Contact the GM Materials Engineer responsible for this specification before testing.. Since certain test parts (such as after corrosion testing) will continue to degrade after end of test.`.`. User=Mirasolo.14. 3..GM WORLDWIDE ENGINEERING STANDARDS GMW3359 Appendix B: Chemical and Applicator Approval Approval of new chemical systems and coating applicators to this specification are strictly controlled based on several factors:  Availability of material and technical support in at least two (2) countries where GM Product Engineering resides. No special handling or treatment allowed. dip time.4. Approvals may be revoked at any time for quality issues and other non-conformances to this specification or AIAG CQI-12.3.8. Official reports (in electronic format) are required.7..  For new applicators.```. differing only in base coat thickness. and C approval for new material and applicator:  Coating material and applicators approved for Type A are automatically approved for Type B. etc. Special arrangements may be allowed for new coating technologies. All applications for new applicators must be made through an existing approved GM chemical supplier.```. Special testing and sampling requirements:  3..``.2 submit ten (10) coated and untested samples.3..  3. Shannon Not for Resale.  3. spin time.  New applicators must have automated coating systems with tilting basket capability. 05/29/2014 12:20:48 MDT .  Type C is considered a completely separate approval.   --`.9 A minimum of ten (10) samples for each test. submit technical data sheet and a "dry film" MSDS for evaluation for potential hazardous material.8. submit an independent AIAG CQI-12 audit report. Coating parameters such as loading weight/amount. User=Mirasolo.5 For each type..`.8. 05/29/2014 12:20:48 MDT ...``..6 For each type. 3. --`. prepare a minimum of 20 samples for NSS testing: Ten (10) pieces are for white corrosion evaluation.GM WORLDWIDE ENGINEERING STANDARDS    GMW3359 3.`.14.15/5940544004.10 Contact the responsible GM materials engineer regarding test requirements for new material and applicator approval.. coating thickness measurement must be by cross section method on five (5) or more random parts.```.3.`.`````-`-`..`--- © Copyright 2014 General Motors Company All Rights Reserved February 2014 Copyright General Motors Company Provided by IHS under license with General Motors Company No reproduction or networking permitted without license from IHS Page 9 of 9 Licensee=Flex-n-Gate LLC 2.5. and the remaining ten (10) pieces for red rust evaluation.``. Shannon Not for Resale. 3.``. Submit all measured sample mounts.```.`.