1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards TEST METHOD OF ORGANIC COATINGS ON INSTRUMENT PANEL Do Not Use on New Programs. Being Replaced by GMW14867 EDS-T-7923 ISSUED DATE: 1998. 05. 21 REVISED DATE: 2008. 03. 26 VERSION: 3 (Superceded) EDS-T-7923TEST METHOD
2、OF ORGANIC COATINGS ON INSTRUMENT PANEL PAGE: 1/3 ISSUED DATE: 1998. 05. 21 REVISED DATE: 2008. 03. 26 VERSION: 3 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project (incl. T255 Program). It is Superceded for all future projects and replaced by GMW14867. 1. PURPOS
3、E This standard aims at specifying general property test of organic coatings on the vehicle instrument panel (hereinafter called “I/P“). 2. SCOPE This standard applies only to I/P with organic coatings on the surface. It also applies to cases in which organic coating types are changed. 3. TEST PIECE
4、 Unless specified otherwise in drawings or material specifications, prepare the sample to the quantity specified in test specifications. When it is difficult to take samples from the product, conduct test with the product. When it is impossible to take samples from the product, prepare samples made
5、of the same material and same painting process. 3.1. No. of samples: At least 3 for each test item 3.2. Test piece size: 100100min. 1.0X 3.3. Samples shall preferably be taken from the product considering the product shape. 4. PRE-TREATMENT Unless specified otherwise in drawings or material specific
6、ations, components in the delivery conditions shall be used without any special pre-treatment. When specified in material specifications, samples shall be pre-treated as specified. Test shall be conducted in the complete component state. When components are cut out for test, the cut surface shall be
7、 protected with adhesive tape, etc. to prevent peeling by moisture or surrounding environment conditions. 5. TEST EQUIPMENT Test equipment specified in clause 6 shall be used. EDS-T-7923TEST METHOD OF ORGANIC COATINGS ON INSTRUMENT PANEL PAGE: 2/3 ISSUED DATE: 1998. 05. 21 REVISED DATE: 2008. 03. 26
8、 VERSION: 3 GM DAEWOO Auto & Technology 6. TEST METHODS AND REQUIRED PHYSICAL PROPERTIES Test item Test method Specifications 6.1. Appearance EDS-T-7759 Visual evaluation No surface flaws, such as blistering, peeling, cracks, bubbles, stains, orange peel on the skin. In case such flaws are present,
9、the sample shall be deemed defective for all test items. 6.2. Cross hatch Only for initial condition GT 0 A: 115 X 240 hrs No surface flaws, such as skin discoloration, gloss deterioration, cracks, blistering 6.3. Heat resistance Condition A EDS-T-7759 GT 0 40X98%R.HX240hrs No surface flaws, such as
10、 skin discoloration, gloss deterioration, cracks, blistering 6.4. Humidity resistance Conduct adhesion performance test 240 hours after humidity resistance test. EDS-T-7759GT 0 EDS-T-7513 No surface flaws, such as skin discoloration, gloss deterioration, cracks, blistering 6.5. Temp. cycle test EDS-
11、T-7513 EDS-T-7759 GT 0 6.6. Stickiness Note) 115X 8HRS X 500g No damage by gauze, paint transformation or stickiness on the skin Judge surface condition after 24 hours of dipping into 40 water No surface flaws, such as skin discoloration, gloss deterioration, cracks, blistering 6.7. Water resistance
12、 Water resistance test EDS-T-7759 GT 0 6.8. Felt abrasion EDS-T-7619-X-Rating A No plastic base to be visible. 6.9. Cleaning agent RESI. EDS-T-7618 Rating 2 (No surface discoloration, blistering, gloss deterioration, chalking, cracks) 6.10. Weather-O-Meter (W.O.M) EDS-T-7415-C3 (1250 KJ/m2) No surfa
13、ce discoloration, blistering, gloss deterioration, chalking, cracks Note) After putting 5 folds of gauze, which is sold at drug stores and trimmed to 25mm2, onto the organic coating surface, leave it inside 115 chamber for 8 hours subjected to DIA. 40mm load. Then evaluate the organic coating surfac
14、e on melting at high temperature, transformation into foreign matters in contact (plastic, trim, steel, etc). 7. ADDITIONAL REQUIREMENTS 7.1. Additional requirements are specified in related drawings or material specifications. 7.2. Materials and components of parts must comply with GMW3059. EDS-T-7
15、923TEST METHOD OF ORGANIC COATINGS ON INSTRUMENT PANEL PAGE: 3/3 ISSUED DATE: 1998. 05. 21 REVISED DATE: 2008. 03. 26 VERSION: 3 GM DAEWOO Auto & Technology 8. CODING SYSTEM Test method of organic coatings on instrument panel - EDS-T-7923 Test method Test iem 9. Deviation Deviations from the conditi
16、ons of this test method shall have been agreed upon. These shall be specified on material specifications, etc. and shall be indicated on test certificates, reports etc. 10. REFERENCE STANDARD EDS-T-7415 Test method for determining color fastness EDS-T-7513 The temperature cycling test method for organic coated products EDS-T-7618 The method for the flexural strength of plastics EDS-T-7619 Test method for determining the abrasion resistance of automotive trim components EDS-T-7759 Cross hatch test method of organic coatings GMW 3059 Restricted and reportable substance for parts
