1、 NON-PRODUCTION MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 03 09 N-STATUS No replacement named L. Sinclair, NA 1988 10 01 Page 1 of 1 CLEANER - ACIDIC - FOR ALUMINUM W-M5B322-A/B NOT TO BE USED FOR NEW DESIGN 1. SCOPE: The material defined by this standard is
2、a nonfoaming, liquid cleaner. 2. APPLICATION: The W-M-5B322-A material is used in spray washer and the B suffix in immersion applications for the cleaning of brazed aluminum radiators and plate-fin evaporators requiring the removal of oxides and/or magnesium deposits prior to the application of a ch
3、romate conversion coating. It may be employed for the treatment of other products of the same general description and/or material. 3. REQUIREMENTS: 3.1 CHEMICAL COMPOSITION: This material is a combination of nitric acid, appropriate activators and ionic detergents used to clean and activate aluminum
4、 surfaces prior to the application of a chromate conversion coating. Suffix A Suffix B 3.2 PH (1% SOLUTION): 1.60-1.80 1.60-1.80 (ASTM E 70) 3.3 SOLUBILITY: 100% soluble in 100% soluble in water in all water in all proportions proportions 3.4 SURFACE TENSION: 70 dynes/cm max 70 dynes/cm max (ASTM D
5、1331) 3.5 FOAMING: Prompt foam height: 1/8 in. (3.2 mm) 1/4 in. (6.4 mm) After 10 min. standing: -0- -0- (FLTM BT101-1, Room Temperature, 5% by volume) 3.6 SPECIFIC GRAVITY (60 F (15 C): 1.240 +/- .040 1.240 +/- .040 (ASTM D 891) 3.7 PERFORMANCE: This material, when used according to W-PL 55-04, W-P
6、L 55-05 and W-PL 55-06, must remove oxides, magnesium deposits due to aluminum brazing processes and other acid-soluble contaminants from aluminum surfaces to promote activation of the surface and subsequent chromate conversion coating. 4. STANDARD PARAGRAPHS: The following standard paragraphs as defined in Manufacturing Standard MBX are herewith made a part of this standard: C1, C2 (initial approval only), P1, P2, P3, R1, R2.
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