通用公司标准GMW 15645-2008 涂料材料规范-非装饰性塑料粉末涂料

VIP免费

venus 2025-11-04 11 90.87KB 5 页 16星币

侵权投诉

WORLDWIDE

ENGINEERING

STANDARDS

Material Specification

Paint GMW15645

Non-Decorative Plastic Powder Coatings

June 2008 Originating Department: North American Engineering Standards Page 1 of 5

1 Scope

This specification covers plastic powder coatings

that are fused on application to properly prepared

metal substrates to form a continuous, durable

coating for purposes such as wear resistance or

squeak prevention. The powders may be applied

by electrostatic spray, fluidized bed, or a variation

thereof.

1.1 Material Description. Five types are covered

by this specification, as follows:

• Type I: a thick epoxy coating for usages such

as seat belt anchor plates, to provide

corrosion resistance and prevent metal edges

from cutting the webbing.

• Type II: a thinner epoxy coating used on

various seat parts and other parts where

prevention of metal-to-metal contact is

required and where some degree of wear

resistance is necessary.

• Type III: a thick nylon 11 or nylon 12 coating

used on parts which are susceptible to high

wear, to prevent squeaks, or to provide a

thermal barrier.

• Type IV: a thinner nylon 11 or nylon 12

coating.

• Type V: a polyester coating for usages such

as seat tracks, where some degree of wear

resistance is necessary.

Note: Some nylons must use a primer to meet the

performance requirements of this specification.

1.2 Symbols. Suffix codes are to be added to the

drawing notes to indicate location on the vehicle

and if the coating is exposed to sunlight:

• Interior (IN) = Interior applications.

• Exterior (EX) = Exterior applications (includes

underhood and underbody).

• Ultraviolet (UV) = Applications exposed to

sunlight whether interior or exterior.

1.3 Typical Applications. These coatings are

typically used for corrosion resistance, seat belt

anchor plates, prevention of metal-to-metal contact

such as on seat parts, protection from wear, etc.

Note that epoxies should not be used in

applications where they are exposed to sunlight.

1.4 Remarks. The Remarks column in the

Approved Source List will indicate for which type

and suffix code each product is approved.

2 References

Note: Only the latest approved standards are

applicable unless otherwise specified.

2.1 External Standards/Specifications.

ASTM D870 ISO 4892-1

ASTM D6677 ISO 4892-2

ISO 105-A03 SAE J2527

2.2 GM Standards/Specifications.

9984303 GMW3286

B 040 0900 GMW3402

EMS 9309574 GMW14162

GM4383M GMW14333

GM6094M GMW14700

GMW3001 GMW14701

GMW3059 GMW14729

GMW3208

3 Requirements

Unless otherwise indicated, the requirements shall

pertain to all types and suffix codes.

3.1 Chemical Requirements. Any phosphated

components must use a phosphate sealer

approved to 9984303.

3.2 Physical Requirements.

3.2.1 Resin. Types I and II shall be epoxy. Types

III and IV shall be nylon 11 or nylon 12. Type V

shall be polyester.

3.2.2 Appearance. The coating must be smooth,

uniform and continuous with no evidence of voids,

craters, sags, blisters, or other surface defects in

the area specified to be coated.

3.2.3 Thickness.

3.2.3.1 Unless otherwise specified on the part

drawing:

• Type I shall be 0.25 mm thick minimum.

• Type II shall be 0.025 mm thick minimum.

GMW15645 GM WORLDWIDE ENGINEERING STANDARDS

Page 2 of 5 June 2008

• Type III shall be 0.38 ± 0.12 mm thick.

• Type IV shall be 0.15 ± 0.08 mm thick.

• Type V shall be 0.127 ± 0.025 mm thick.

3.2.3.2 Due to the thickness of these coatings, they

should not be used in fastened joints.

3.3 Performance Requirements. The following

tests are to be performed at 22 ± 2°C and 50 ± 5%

Relative Humidity (RH) unless otherwise specified.

Testing shall be performed on parts or

representative coated panels. Coated test panels

shall be used for material qualification only.

3.3.1 Cure (Types I, II and V only). There shall be

no softening of the coating or evidence of

tackiness when a rag saturated with a solvent

recommended by the powder supplier is placed on

the coating for approximately 30 s.

3.3.2 Adhesion and Humidity.

3.3.2.1 Suffix Codes EX and EX/UV. Parts or

panels shall be exposed for 96 h to water fog

humidity per GMW14729. After exposure, there

shall be no blistering or appearance change. Parts

shall rate 6 or better when tested per the

procedure in Appendix B.

3.3.2.2 Suffix Codes IN and IN/UV. Parts or

panels shall be exposed for 24 h to water fog

humidity per GMW14729. After exposure, there

shall be no blistering or appearance change. Parts

shall rate 6 or better when tested per the

procedure in Appendix B.

3.3.3 Neutral Salt Spray.

3.3.3.1 Suffix Code EX. There shall be no more

than 10% blistering or peeling of the powder

coating after 168 h neutral salt spray exposure per

GMW3286.

3.3.3.2 Suffix Code EX/UV. There shall be no

more than 10% blistering or peeling of the powder

coating after 336 h neutral salt spray exposure per

GMW3286.

3.3.3.3 Suffix Codes IN and IN/UV. After 96 h

exposure in neutral salt spray per GMW3286, there

shall be no red rust or white corrosion on coated

panels or parts.

3.3.4 Water Soak. Parts or panels shall be soaked

for 127.5 ± 7.5 minutes in Deionized Water at

38 ± 1°C per ASTM D870. After exposure, there

shall be no defects or metal corrosion. Samples

shall rate 6 or better when tested per the

procedure in Appendix B.

3.3.5 Resistance to Stone Impact (Suffix Code

EX). Samples shall rate 7 or higher after testing

per GMW14700, Method C.

3.4 Additional Requirements. The following tests

are for new material approvals only. They shall be

conducted on coated panels.

3.4.1 Compatibility (Type I only). The coating

material must not stain, degrade or have any other

detrimental effect on polyester seat belt webbing

when tested per the following procedure:

3.4.1.1 A light colored sample of seat belt webbing

shall be placed in contact with the coating and

placed in a closed container for two weeks at

93 ± 2°C in an air circulating oven. A control

sample of webbing not in contact with the coating

shall be placed in a similar container and exposed

at the same time and temperature. After exposure,

comparison and evaluation of detrimental effects

shall be made versus the control.

3.4.2 Environmental Resistance. After exposure

and impact per the procedure in Appendix A, the

coating must show no chipping, cracking,

blistering, softening, effect on adjacent materials

(effect on corrosion resistance of the metal,

staining, etc.), objectionable change in color or

other detrimental effects (mushrooming without

cracking when impacted is acceptable).

3.4.3 Resistance to Wear. Coated panels shall be

subjected to 1000 cycles with CS17 wheels and a

1000 g load on the Taber Abraser, per GMW3208.

Weight loss of Types I and II shall be 0.06 g,

maximum. Weight loss of Types III, IV and V shall

be 0.025 g, maximum.

3.4.4 Interior Finish Durability (Suffix Code

IN/UV only).

3.4.4.1 Test for Colorfastness to light per

GMW14162/D/601.1 Kilojoules per square meter

(kj/m2). After exposure, coated panels shall show

no objectionable gloss or color change, chalking,

or other visible surface deterioration.

3.4.4.2 Effect of Cleaners. Coated panels shall be

tested per GMW3402 Procedure B Codes 1, 2, 3,

4, and 5. There shall be no discoloration of the

surface or transfer of color to the cloth. The white

cheesecloth shall have a rating better than Grade 4

on the chromatic transference scale per ISO 105-

A03.

3.4.5 Exterior Finish Durability (Suffix Code

EX/UV only). Coated panels shall be exposed in

xenon arc weatherometer per ISO 4892-1 and

ISO 4892-2 as specified in 3.4.5.1 or

per SAE J2527 Extended UV Filters as specified

in 3.4.5.2. Evaluate per 3.4.5.3.

3.4.5.1 ISO Procedure. Test as per the conditions

of ISO 4892-1 and ISO 4892-2, as shown here in

Table 1. Panels shall be exposed for >3000 kJ/m2.

GM WORLDWIDE ENGINEERING STANDARDS GMW15645

June 2008 Page 3 of 5

Table 1: ISO Procedure Conditions

Parameter Requirement

Inner- and Outerfilter Borosilicate

Radiant exposure 0.50 W/m2 at 340 nm

Test program Cam Number

7 102 ± 0.5 minutes light

only. 18 ± 0.5 minutes

light and spray

Black-standard temperature +80 ± 3°C

3.4.5.2 SAE Procedure. Test as per the conditions

of SAE J2527 Extended UV Filters.

3.4.5.3 Evaluation. After exposure, there shall be

no indications of surface tackiness or

embrittlement, blooming, blistering, change in

hardness, color or gloss, or other factors which

might affect the function or appearance of the part.

3.4.6 Resistance to Various Environmental

Inputs (Suffix Code EX).

3.4.6.1 Temperature Resistance. After test

panels are baked at 100 ± 2°C for 24 ± 1 h, there

shall be no evidence of coating breakdown.

3.4.6.2 Fuel Resistance. Coated panels shall

meet requirements of GMW14333, A, Rating 2.

Adhesion shall be tested using the method in

Appendix B. Panels shall rate 8 or better.

3.4.6.3 Oil Resistance. Test panels shall be

immersed in engine oil per B 040 0900, EMS

9309574 and GM6094M and then exposed for

24 ± 1 h in a drying oven at +100 ± 3°C. Evaluate

after cooling to +23 ± 5°C. There shall be no

discoloration, change in gloss, shrinkage, swelling,

dissolution, wrinkling or creasing, blistering,

distortion, or cracking.

3.4.6.4 Chemical Spot Test. Panels shall be

tested per GMW14701, Methods 1 and 2, using 10,

1.0 and 0.1% solutions by weight of Analytical

Reagents of the following:

• Acetic Acid

• Hydrochloric Acid

• Sulfuric Acid

• Sodium Hydroxide

After exposure, panels shall rate 8 minimum.

4 Manufacturing Process

Not applicable.

5 Rules and Regulations

5.1 All materials supplied to this standard must

comply with the requirements of GMW3001, Rules

and Regulations for Material Specifications.

5.2 All materials supplied to this standard must

comply with the requirements of GMW3059,

Restricted and Reportable Substances for

Parts.

6 Approved Sources

Engineering qualifications of an approved source

are required for this standard. Only sources listed

in the GM Materials File (i.e., GM Supply Power)

under this standard number have been qualified by

engineering as meeting the requirements of this

standard.

For other GM locations, the responsible

engineering group should be contacted to obtain

the approved source in that individual country.

7 Notes

7.1 Glossary. Not applicable.

7.2 Acronyms, Abbreviations, and Symbols.

EX Exterior

IN Interior

kJ/m2 Kilojoules per square meter

RH Relative Humidity

UV Ultraviolet

8 Coding System

This standard shall be referenced in other

documents, drawings, etc., as follows:

Material per GMW15645 Type W-YY/ZZ

Where:

W is one of five types described in paragraph 1.1,

YY is either IN for interior applications or EX for

exterior applications, and ZZ is UV, which is only

used if the coated component will be exposed to

sunlight.

Examples:

GMW15645 Type IV-IN/UV is a nylon coating that

is used on a component that is located inside the

vehicle where it may be exposed to through glass

sunlight.

GMW15645 Type II-EX is an epoxy coating that is

used on a component that is located underhood or

underbody.

9 Release and Revisions

9.1 Release. This standard originated in July 2007,

replacing GM4383M. It was first approved by the

Global Finish Team in June 2008. It was first

published in June 2008.

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

亲，本站95%以上的标准规范都面向会员免费，办理VIP会员下载更省钱，平均每篇不到2元

立即下载 VIP免费下载

标签： #塑料 #装饰 #粉末涂料

摘要：

本页面详细解读通用公司标准GMW 15645-2008《涂料材料规范-非装饰性塑料粉末涂料》，该标准主要针对汽车及工业领域中用于塑料基材的非装饰性（功能性）粉末涂料的性能要求与测试方法。内容涵盖涂料的附着力、耐化学性、耐候性、硬度及施工工艺规范，适用于需要保护塑料部件表面、提升耐磨及耐腐蚀性能的涂装场景。本站提供标准全文摘要、关键参数解析及合规操作建议，帮助工程师、采购及品质管理人员快速掌握GMW 15645-2008的核心技术要点，确保选材与检测符合通用汽车原厂规范。

展开>> 收起<<

通用公司标准GMW 15645-2008 涂料材料规范-非装饰性塑料粉末涂料.pdf

共5页,预览3页

还剩页未读，继续阅读

声明：本文档系会员上传，若文档所含内容侵犯了您的版权或隐私，请立即通知，我们立即给予侵权申诉删除！

通用公司标准GMW 15645-2008 涂料材料规范-非装饰性塑料粉末涂料

相关推荐

开通VIP享超值会员特权

相关内容

热门标签

举报选择: