1、ABN 84 006 893 232 GM Holden Limited Engineering Department LABO RATO RY TEST M ETHO D NUMBER SHEET RELEASE REVISION : HN 0286 1 of 2 September, 2000 June, 2008 NAME: PAINT COMPATIBILITY WITH PURGE SOLVENT THIS DOCUMENT MUST NOT BE REPRODUCED. IF USED IN RELATION TO THE COMPANYS PRODUCTS THE RECIPIE
2、NT IS RESPONSIBLE TO CONFIRM THE DOCUMENT ISSUE DATE IS STILL VALID. FORM : S:EngBusProcessEngMaterialsMatlsAndAppearanceNBRspecific0AdminMgmtStandardFormsMatspec.doc 1. SCOPE This test method evaluates purge solvent compatibility with paint under various process conditions with the aim of determini
3、ng if mixing, overspraying or underspraying of paint materials with purge solvent causes cratering. 2. PANEL PREPARATION As nominated in the relevant material specification. 3. APPARATUS 3.1 Mixing container 3.2 Measuring device 3.3 Spray equipment 3.4 Oven - fan forced convection 4. METHOD 4.1 Mixi
4、ng Compatibility Reduce a paint sample 25% by volume with the test thinner and spray a standard steel test panel with the paint at specified film build ( 40 microns +/- 5 microns for primer/surfacer, 20 microns +/- 2 microns for basecoat, 30 microns +/- 5 microns for clearcoat and 35 microns +/- 5 m
5、icrons for solids ). Cure the film at the recommended bake schedule. The standard purge solvent formula is referenced in HN0285 Section 3.5 and is used as a reference for purge compatibility testing. 4.2 Overspray Compatibility Spray a standard steel test panel with the paint at specified film build
6、 ( 40 microns +/- 5 microns for primer/surfacer, 20 microns +/- 2 microns for basecoat, 30 microns +/- 5 microns for clearcoat and 35 microns +/- 5 microns for solids ). Mist coat the wet film with the purge thinner. Cure the film at the recommended bake schedule. The standard purge solvent formula
7、is referenced in HN0285 Section 3.5 and is used as a reference for purge compatibility testing.ABN 84 006 893 232 GM Holden Limited Engineering Department LABO RATO RY TEST M ETHO D NUMBER SHEET RELEASE REVISION : HN 0286 2 of 2 September, 2000 June, 2008 NAME: PAINT COMPATIBILITY WITH PURGE SOLVENT
8、 THIS DOCUMENT MUST NOT BE REPRODUCED. IF USED IN RELATION TO THE COMPANYS PRODUCTS THE RECIPIENT IS RESPONSIBLE TO CONFIRM THE DOCUMENT ISSUE DATE IS STILL VALID. FORM : S:EngBusProcessEngMaterialsMatlsAndAppearanceNBRspecific0AdminMgmtStandardFormsMatspec.doc 4. METHOD 4.3 Underspray Compatibility
9、 Mist coat a standard steel test panel with the purge thinner and then spray the panel with paint at specified film build ( 40 microns +/- 5 microns for primer/surfacer, 20 microns +/- 2 microns for basecoat, 30 microns +/- 5 microns for clearcoat and 35 microns +/- 5 microns for solids ). Cure the
10、film at the recommended bake. The standard purge solvent formula is referenced in HN0285 Section 3.5 and is used as a reference for purge compatibility testing. 5. EVALUATION Examine the surface of the steel panels for defects. 6. REVISIONS June, 2008 - Section “4. METHOD”, Section “4.1Mixing Compatibility”, “4.2 Overspray Compatibility”, “4.3 Underspray Compatibility -Include information on the standard purge solvent formula and its use as a reference for testing. Prepared By: Adam Ritchie
