GMNA-9984152-1988.pdf
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1、I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint BLANK WASH - OIL EMULSION, WATER DILUTABLE 9984152 1 SCOPE. This spccilication details the requirements of water dilutable, oil emulsion cleaners used in the washer section of flex roll and straightener quipment or blank washin
2、g equipment. These materials are used to wash off contaminants from sheet metal as it is uncoiled and blanked or just prior to metal forming operations. 2 REFERENCED STANDARDS. GM3623M GM9613P GM961 1P GM9615P GM9612P GM9617P 9981833 9981881 3 REQUIREMENTS. Specific material requirements and appropr
3、iate test methods are listed under properties. These requirements apply for cold rolled, hot dip, and electrogal- vanized sheet metal substrates. 3.1 Physical Properties. Small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-lop. Medium . . . . . . .
4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-25 cm Large . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 pm. 3.1.1 Chemical Rquirements. No silicone or lanolin com- 3.3.3.3 Coating Mass. &zing mass shall be determined
5、by pound of any kind is allowed in the material. the weigh-strip-weigh method. 3.1.2 The concentration of the material for each test require- ment will be set prior to the material evaluation. SUbStrate 3.1.3 The concentration range for production use will be set at the time of approval. I - . Cold
6、Rolled Steel I 1.1-2.7 GZllVanized I- 1 6-3 3 . . 3.2 Performance Rquirements. Ahlminnm I 1.1-2.2 3.2.1 Corrosion Resistance (GM9617P). Sheet metal coated with the material over a GM approved mill oil (9981833) or prelube (998 188 1) must not exhibit any rust or staining under normal shipping, handl
7、ing, or storage conditions which would impair processing the sheet. NOTE: GM Paint Engineering, not the phosphate supplier, will determine the disposition (pass or reject based on the results. 3.2.1.1 The material tested per GM9617P must not exhibit more corrosion or staining than the control panels
8、 after 1, 5, and 10 cycles with no more than slight stain or corrosion being acceptable after 10 cycles. 3.3.4 ELPO Primer Compatibility (GM9612P). A rating of 6 or better on a scale of 0 to 10 (with 10 being the beat) is required. , 3.4 Stacked Metal Rquirements. The material must protect the sheet
9、 metal from staining or corrosion for 24 h when stored in a stacked condition. 3.2.2 Cleaning. A clean blank with a continuous oil film must emerge from the washing operation. 3.2.3 Continuous Gil Film. A continuous oil film is required on the sheet metal prior to the first stamping operation. The f
10、ilm must not dissipate during successive stamping and trimming operations. 3.5 Easy Dilution and Normal Agitation. This material must not require special mixing equipment and no more than moderate agitation must be required to achieve a uniform mixture. 3.3 Process Rquirements. 3.6 Die or Roll Coate
11、r Buildup. The material must not require excessive effort to remove from dies or roll coaters after a weekend 3.3.1 Compatibility with Structural Adhesive (GM3623M). The material must meet the rquirements of GM3623M or limits set by the design engineer. 3.7 Storage Stability. The material must meet
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