GMW-3402-2005.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS Test Method Materials GMW3402 Soil and Cleaner Resistance of Automotive Materials Copyright 2005 General Motors Corporation All Rights Reserved September 2005 Originating Department: North American Engineering Standards Page 1 of 3 1 Scope This two-part procedure det
2、ermines the resistance of materials to specific soils and generic cleaning products. Note: Nothing in the specification supersedes applicable laws and regulations unless specific exemption has been obtained. Note: In the event of conflict between the English and domestic language, the English langua
3、ge shall take precedence. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 105-A02 ISO 105-F09 ISO 105-A03 ISO 105-X12 2.2 GM Standards/Specifications. None 3 Test Equipment 3.1 Crockmeter as described in ISO
4、105-X12. The apparatus should have a cylindrical rubbing finger of 16 mm diameter, move “to and fro” in a straight line along a 100 mm track while exerting a force of 9 0.5 N. 3.2 Cotton rubbing cloth, per ISO 105-F09. 3.3 Glass Stirring Rod. 3.4 Dose Syringe graduated in ml. 3.5 Analytical Balance,
5、 accurate to 0.01 g. 3.6 Thermometer, accurate to 0.1C. 3.7 Spatula. 3.8 Suitable cutting tools for preparation of test specimens. 3.9 Gray Scale for Color Change ISO 105-A02. 3.10 Gray Scale for Staining ISO 105-A03. 4 Test Material 4.1 Soiling Agents. Code A Sewing Machine Oil (3 to 4 drops) Code
6、B Petroleum Jelly (0.05 g) Code C Instant Coffee (mixed 2.5 0.1 g coffee to 240 5 ml water, heated to 60 to 80C Code D Ketchup (1 ml) Code E Blue or Black Ball Point Pen, 5 mm circle, colored in Code F Brown Soft Drink (1 ml) Code G Regular Soy Sauce (3 to 4 drops) Code H Potting Soil (1 g mixed wit
7、h 5 ml distilled water) Code I Salt, saturated NaCI solution (1 ml) Code J Chocolate Milk (1 ml) 4.2 Cleaning Agents. Code 0 De-ionized water Code 1 Naptha Code 2 Soap Detergent, to contain no optical brighteners, neutral pH (0.5% by weight in distilled water) Code 3 White Vinegar (3 parts water: 1
8、part Vinegar) Code 4 Ammonia (3 parts water: 1 part Ammonia) Code 5 Isopropyl Alcohol 5 Test Method 5.1 Summary of Test Method. The soils are applied to a specimen and allowed to stand for a specified amount of time. The soils are cleaned from the specimen using the prescribed cleaner. Another test
9、specimen is used to test the colorfastness to rubbing when exposed to the cleaners used to clean the soils from the material. 5.2 Test Sample Preparation. 5.2.2 Procedure A: Soil Resistance. 5.2.2.1 Cut a test specimen about 100 x 100 mm for each soil prescribed in the relevant material specificatio
10、n. 5.2.2.2 Cut a piece of the white rubbing cloth about 150 x 150 mm for each soil/cleaner combination prescribed in the relevant material specification and Table 1 of this document. GMW3402 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2005 General Motors Corporation All Rights Reserved Page 2 of 3
11、September 2005 5.2.3 Procedure B: Cleaner Resistance. 5.2.3.1 Cut a test specimen about 125 x 75 mm for each cleaner prescribed in the relevant material specification. 5.2.3.2 Cut a piece of the white rubbing cloth about 25 x 25 mm for each cleaner prescribed in the relevant material specification.
12、Table 1: Cleaner Codes Usage Order Soil Code Cleaner Codes in the Order to be Used A 0 1 2 4 3 B 0 1 2 4 3 C 0 2 3 D 0 4 E 0 5 1 F 0 2 4 3 G 0 2 4 3 H 0 2 4 1 I 0 2 0 J 0 4 2 0 5.3 Test Procedure. 5.3.1 Procedure A: Soil Resistance. 5.3.1.1 Apply each soil prescribed in the appropriate material spec
13、ification to a labeled test specimen using a dose syringe. Work into the specimen using a glass stirring rod. For fabrics treated with soil repellent finishes, apply gentle pressure with the glass stirring rod taking care not to rupture the soil repellent finish. 5.3.1.2 See pertinent material speci
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- GMW 3402 2005
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