GMNA-9981873-1992.pdf
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1、E 9006379 0002745 30T DRAWING COMPOUNDS-WATER DILUTABLE, FOR ALUMINUM SHEET 9981873 1 SCOPE. This specification details the requirements of water dilutable drawing compounds that must be compatible with current production processes and paint systems. These compounds provide additional lubricity to a
2、id in aluminum sheet metal forming operations and are designed to be used at a wet film thickness not exceed 0.02 mm at the time of application. sets after phosphating, and results shall be comparable to the control panels. 3.3.3.1 Appearance. Immediately after the final rinse and be- fore drying, t
3、he phosphated surfaces shall exhibit a continuous water fihn. 2 REFERENCED STANDARDS. GM3623M GM9613P GM9733P GM9531P GM9615P 9981833 GM961 1P GM9617P 3 REQUIREMENTS. Specific material requirements and appropriate test methods are listed under properties. These requirements apply for aluminum sheet
4、metal substrates &. 3.4.3.2 Crystal Size (GM9613P). Crystal size shall be small to medium when viewed under 250X magnification. 3.4.3.3 Coating Mass (GM9733P). Substrate Coating Mass (g/m3 I (mdft2) Aluminum I 1.1 - 2.2 I 100-200 3.1 PHYSICAL PROPERTIES. 3.3.4 ELPO Primer Compatibility (GM9532P). A
5、rating of 6 orbetteronascaIeofOto10,with10beingthebest,isrequired. 3.1.1 Chemical Requirements. No silicone or Ianolin com- pound of any kind is allowed in the material. 3.4 STACKED METAL REQUIREMENTS. The material must protect the sheet metal from staining or corrosion for 24 h when stored in a sta
6、cked condition. 3.1.2 The concentration of the material for each test require- ment will be set prior to the material evaluation. 3.1.3 The concentration range for production use wilI be set at the time of approval. 3.5 EASY DILUTION AND NORMAL AGITATION. This material must not require special mixin
7、g equipment and no more than moderate agitation must be required to achieve a uni- form mixture. 3.2 PERFORMANCE REQUIREMENTS. 3.2.1 Corrosion Resistance (GM9617P). Aluminum substrates coated with the material over a GM approved mill oil (998 1833) must not exhibit rust or staining under normal ship
8、ping, han- dling or storage conditions which would impair processing the sheet. 3.6 DIE OR ROLL COATER BUILD UP. The material must not require excessive effort to remove from dies or roll coaters after a weekend. 3.7 STORAGE STABILITY. The material must meet all of the requirements of the specificat
9、ion after being stored under nor- mal conditions for a period of 90 days. This period commences upon receipt of the material 3.2.1.1 The material tested per GM9617P must not exhibit 3.8 DRAWABILITY. The material must perform satisfactorily more corrosion or staining than the control panels after 1.
10、5 and as a drawing aid in the metal fabrication plant tryout. This spec- 10 cycles, with no more than slight stain or corrosion being ac- ification is designed to test materials which aid in light to heavy ceptable after 10 cycles. duty drawing of sheet metal. 3.3 PROCESS REQUIREMENTS. 3.3.1 Compati
11、bility with Structural Adhesive (GM3623M). The material must meet the requirements of GM3623M or lim- its set by the design engineer. 3.9 COEFFICIENT OF FRICTION (REQUIRED FOR ENGI- NEERING INFORMATION). Report the rating on the draw bead simulator test. State the method and describe the equip- ment
12、 used to determine the rating. 3.3.2 Welding Requirement (GM9615P). The material must perform comparable to or better than the currently approved ref- erence (control) 9981833. 3.4.3.4 Plant Requirements. After passing the requirements above of tbis specification this material(s) must perform satis-
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