1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15406 Aftermarket Repair Systems for Dealership Warranty Work Primer/Basecoat/Clearcoat Copyright 2013 General Motors Company All Rights Reserved September 2013 Page 1 of 5 1 Scope 1.1 Material Description. This specification covers the requ
2、irements for primer/basecoat/clearcoat aftermarket repair systems used for GM warranty work. These systems are air dried or forced air dried at 82 C (180 F) or less. They are designed to repair Original Equipment Manufacturer (OEM) basecoat/clearcoat (BC/CC) systems but are of different formulations
3、 and/or chemistries than typical OEM products. 1.2 Symbols. Not applicable. 1.3 Typical Applications. This specification applies to all exterior paint repair systems for use on vehicles and painted parts. 1.4 Remarks. 1.4.1 The primer, basecoat and clearcoat are two-component materials of varying ch
4、emistries. They are typically higher in volatile organic compounds (VOC) than OEM systems and must comply with local, state, and Federal emission regulations. 1.4.2 Primers, basecoats, and clearcoats approved to this specification are a system and not interchangeable. Only the specified anticorrosio
5、n primer, surfacer, and BC/CC systems tested and approved to this specification can be used for GM warranty work. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. SAE J2527 2.2 GM Standards/Specifications. GMW3059
6、 GMW14700 GMW14829 GMW15919 GMW14124 GMW14701 GMW14873 GMW16746 GMW14333 GMW14729 GMW15187 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). GMW15406 Approved Refinish Materials Manual (available at ) 3 Requirements Product Information. A submission let
7、ter, a Material Safety Data Sheet (MSDS), and the basic physical property information of all materials must be provided to the responsible engineer prior to any testing. The responsible Manufacturing Engineering Vehicle Systems and Service Operations engineers will establish any additions or changes
8、 to this specification and agree upon what substrates, associated materials, and control materials are to be used in the submission. The supplier must then provide all applicable additional product information. 3.1 Panel Requirements for Rigid Systems. All testing specified in Section 3.2 of this do
9、cument must be completed and approved to this specification for use as GM warranty repair material. Report all results on a spreadsheet, labeling all tests, colors, and panel preparations. Controls will be current OEM systems. 3.1.1 Panel Preparation. Four (4) OEM colors must be tested which include
10、 White, Light Metallic, Red Mica, and Black. OEM technologies and specific color WA numbers will be communicated in August Model Year -1. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license fr
11、om IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15406 Copyright 2013 General Motors Company All Rights Reserved September 2013 Page 2 of 5 OEM panels can be prepared with approved phosphate, electrodeposition primer (ELPO) or E-coat (electrocoat), and primer surfacer at target film/target bake. Bas
12、ecoat and clearcoat for these panels are to be prepared at target film build/target bake or as agreed upon by the responsible engineer. Repair panels must be prepared as follows for approval: a. Electrogalvanized (EG) Steel/ELPO Repair. Repair anticorrosion/surfacer/basecoat/clearcoat over EG steel
13、and ELPO. b. ELPO/Surfacer Repair. Repair surfacer/basecoat/clearcoat over OEM ELPO and OEM surfacer. c. Clearcoat Repair. Repair basecoat/clearcoat over OEM clearcoat. 3.1.1.1 EG Steel/ELPO Repair. Prepare an EG steel panel with one-half OEM E-coat. Scuff-sand the entire panel with the manufacturer
14、-recommended process. Repair the EG half of the panel with anticorrosion primer, surfacer, basecoat, and clearcoat. Repair the E-coat half of the panel with surfacer, basecoat, and clearcoat. 3.1.1.2 ELPO/Primer Repair. Prepare a steel panel with OEM E-coat. Mask one-half of the panel and spray with
15、 OEM surfacer and bake at target temperature. Scuff-sand the entire panel with the manufacturer-recommended process. Repair the panel with surfacer, basecoat, and clearcoat. 3.1.1.3 Clearcoat Repair. Prepare a steel panel with an entire OEM system. Scuff-sand the panel with the manufacturer-recommen
16、ded process. Mask the top half of the panel and spray with repair basecoat. Unmask the panel and spray the entire panel with repair clearcoat. 3.1.1.4 Aluminum Repair. Prepare an aluminum panel (AA6111) with one-half OEM E-coat. Scuff-sand the entire panel with the manufacturer-recommended process.
17、Repair the aluminum half of the panel with anticorrosion primer, surfacer, basecoat, and clearcoat. Repair the E-coat half of the panel with surfacer, basecoat, and clearcoat. 3.1.2 Cure. The supplier will define the minimum and maximum cure for each specific technology. 3.1.3 Panel Aging. Except as
18、 noted for individual tests, age panels for seven (7) days prior to the start of testing. Note: Do not exceed this time for basic testing. 3.1.4 Appearance. There must be no significant variance from the OEM topcoat materials in texture, gloss, or distinctness of image (DOI). Test panels must also b
19、e an acceptable match to color standard and be defect-free. 3.1.5 Film Build. Repair films will vary depending on process and basecoat color. Use the guidelines in Table 1 unless otherwise specified per prior agreement with the responsible engineer. Table 1: Film Build Guidelines Prime Films Base Fi
20、lms Clear Films 1.0 mil 0.5 mil to 1.5 mil 2.0 mil 25.4 m 12.7 m to 38.1 m 50.8 m 3.2 Basic Testing for Rigid Systems. The following tests must be done on all four (4) panel preparations with all four (4) colors specified, except where noted. Target films and bake for repair materials are used for t
21、hese tests. a. Initial Adhesion (GMW14829). There must be a minimum rating of 1. b. Humidity/Adhesion (GMW14729 96 h + GMW14829). Must be a minimum rating of 1. c. Gravelometer (GMW14700, Method A). Minimum rating of 8. For aluminum test panels, a steel backer plate 3 mm (1/8 in) must be used. d. Ga
22、soline Resistance (GMW14333, Method A). No discoloration, blistering, or paint removal. Use only white color for the test. Prepare panels according to Paragraphs 3.1.1.1, 3.1.1.2, and 3.1.1.3 only. e. Staining Resistance (GMW14701). No yellowing or staining. Chemicals to be determined. Use white pan
23、els for the test. Prepare panels according to Paragraph 3.1.1.3 only. Use an approved OEM basecoat/clearcoat system as a control. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,
24、-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15406 Copyright 2013 General Motors Company All Rights Reserved September 2013 Page 3 of 5 3.2.1 Xenon Exposure (SAE J2527 - Exterior Cycle). Run one (1) set to 4500 kJ exposure. Compare gloss loss, color shift, cracking, and 96 h humidity resistance. Tests m
25、ust be run with all panel conditions on all four (4) colors. 3.2.2 Florida Exposure (GMW14873). Five (5) south black box exposure. Panels must be exposed for a minimum of one (1) year, continued through five (5) years, and then to failure. Samples must be returned after 12 months and 24 months for a
26、dditional testing, including gravelometer (GMW14700, Method A) humidity and adhesion tests (GMW14729, 96 h + GMW14829). New technologies must have a minimum of 12 months exposure history prior to approval. Tests must be run with 3.1.1.1 and 3.1.1.3 panel conditions on all four (4) colors. One (1) pa
27、nel for each color in each of the conditions must be retained as a control. For reporting, wash the entire panel and polish half of the panel lengthwise. Report washed and washed/polished gloss and percentage of gloss retention in each case from initial readings. 3.3 Panel Requirements for Flexible
28、Systems. All testing listed in 3.4 must be completed and approved for use as GM warranty repair materials. Flexible basecoat/clearcoat systems must be the same as rigid materials with additives to make them flexible. 3.3.1 Panel Preparation. Four (4) OEM colors must be tested which include White, Li
29、ght Metallic, Red Mica, and Black. OEM flexible materials and specific color WA numbers will be communicated in August Model Year -1. Thermoplastic Polyolefin (TPO) panels (GMW15187) will be used for all flexible testing prepared with GM approved adhesion promoter wet-on-wet application with OEM fle
30、xible topcoats. Panels will be baked at 121 C (250 F) for 30 minutes part temperature. Panel repair will be as follows: 3.3.1.1 TPO Repair. Sand a bulls-eye in the top half and bottom half of the panel with appropriate feathering technique and repair with a flexible system of prime, basecoat, and cl
31、earcoat. 3.3.1.2 TPO Raw. Wash, prime, and paint raw TPO panels with a flexible system of prime, basecoat, and clearcoat. 3.3.2 Cure. See 3.1.2. 3.3.3 Panel Aging. See 3.1.3. 3.3.4 Appearance. See 3.1.4. 3.4 Basic Testing for Flexible Systems. The following tests must be done on both panel preparati
32、ons with all four (4) colors. Target film builds and drying times for repair materials are used for these tests. a. Initial Adhesion (GMW14829). Minimum rating of 1. b. Humidity/Adhesion (GMW14729, 96 h + GMW14829). Minimum rating of 1. c. Automotive Environmental Cycles (GMW14124, Cycle A 15 Cycles
33、 + Adhesion GMW14829). No cracking or adhesion loss. d. Gasoline Immersion (GMW14333, Method B). Must meet 45 minutes with 25% removed. Use only white color for the test. e. Thermal Shock (GMW15919 Performed in Triplicate). No catastrophic failures. f. Mandrel Bend. Raw TPO Only (GMW16746, Room Temp
34、erature). Minimum rating of 7. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflict between the English and domes
35、tic language, the English language shall take precedence. 5.3 Inspection and Rejection. 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 departmen
36、t prior to commencement of delivery of bulk supplies. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15406 Copyright 2013 General Motors
37、 Company All Rights Reserved September 2013 Page 4 of 5 A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release must be completed. It is the re
38、sponsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeated and documented by the supplier pr
39、ior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change in chemi
40、cal composition of an existing product has occurred, 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.
41、 In addition, 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. 5.5 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Repor
42、table Substances for Parts. 5.6 Initial Source Approval. No shipments shall be made by any supplier until representative initial production samples have been approved by the appropriate Materials Engineering department(s) as meeting the requirements of this specification. 6 Approved Sources Material
43、s supplied to this specification must be approved by General Motors. The appropriate GM Materials Engineering department(s) (Product Engineering or Manufacturing Engineering) must confirm material as meeting the requirements of this specification. Only materials/sources listed in the GM Globally App
44、roved Refinish Materials Manual under this standard number have been qualified by Engineering as meeting the requirements of this standard. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. B
45、C/CC Basecoat/Clearcoat DOI Distinctness of Image E-coat Electrocoat EG Electrogalvanized ELPO Electrodeposition GHS Globally Harmonized System of Classification and Labeling of Chemicals MSDS Material Safety Data Sheet OEM Original Equipment Manufacturer SDS Safety Data Sheet TPO Thermoplastic Poly
46、olefin VOC Volatile Organic Compound 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW15406 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted
47、 without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15406 Copyright 2013 General Motors Company All Rights Reserved September 2013 Page 5 of 5 9 Release and Revisions This standard was originated in August 2006. It was first approved by Global Paint Team in January 2007. It was first
48、 published in February 2007. Issue Publication Date Description (Organization) 1 FEB 2007 Initial publication. 2 SEP 2013 Updated references. (Manufacturing Engineering Vehicle Systems Primer/Topcoat/Color Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
