1、 2-x-5B322A-3 Page 1 1. SCOPE: The material defined by this standard is a nonfoaming, Liquid cleaner. 2. APPLICATION: The U-ff-5B322-A material is used in spray washer and che B dfix in mrsion applications for the cleaning of brazed aluminum radiators and plate-fin evaporators requiring the removal
2、of oxides and/or rpagnesiun &posits prior to the application of a chromate conversion coating. It may be empkoyed for the treatment of ocher products of the same. general description and/or material. 3.L CHEMICAL COMPOSXTION: This material is a combination of nizrlc acid. appropriate activarors and
3、ionic decergencs used co clean and activate aluminum surfaces prior EO che application of a chromaca conversion coacing. Suffix x Surfix 3 3.2 PH (1% SOLDTION) : , . (ASTI4 E 70) . 3.3 . SOLlTBILITY: , 3 .L SURFACE TENSION: (ASTM D 2331) 1.60-1.80 1.60-1.80 100% soluble in 100% soluble in water in a
4、ll water in a11 proportions proportions 70 dynes/= max 78 dynes/cm max 3.5 MAKING : Prompt foam height: 1/8 in. (3:2 mm) l/r* in. (6.0 nun) After LO min. standing : -0- (FLTX BTlOl- 1, Room Temperamre, 5% by volume ) -0- 3.7 PERFORMANCE: This material. when used according to 3-PL 55-Or*, U-PL 55-05
5、and U-PL 55-06, must remove oxides, magnesium deposics due co aluminum brazing processes and other acid-soluble contaminants from aluminum surfaces co promote activation of the surface and subsequent chromate conversion coating. u. STANDARD PARAGRAPHS: The following standard paragraehs as defined in Hanufaccuring Standard KBX are herewith made a part of chis standard: C1, C2 (initial approval only), P1, P2. P3, R1. R2.
