Aluminum trivalent chromium passivation agent

Applications This product is green acidic liquid. FDA performed chemical oxidation treatment aluminum surface speed, the film was good corrosion resistance, and paint adhesion strong, bath and simple maintenance management. Features 1. Excellent corrosion resistance. Bare aluminum neutral salt spray 360 hours or more. Meet or exceed MIL-DTL-81706B and MIL5541F corrosion standards. 2. It can be used for aluminum and aluminum die casting. 3. Forming a layer of transparent, light color film. Film has less than 0.8 mOhm / cm2 low contact resistance, high temperature and other characteristics. 4. Environmental protection, safety, non-toxic, in line with RoHS, ELV, WEEE regulations. Wastewater treatment is simple. 5. Applicable to dipping, spraying, hand wipe. III. Chemical properties of green acidic liquid concentrate, containing trivalent chromium salts. Specific gravity 1.02 ± 0.011Kg / L 25 ℃ pH value 2.8-3.6 IV. Use 1. Slot allocation KR-04 diluted with deionized water tank. KR-04: 100 ml / l (immersion) 150 ml / l (spray) Please thoroughly clean the tanks in front of slot allocation for the new tank or new production lines, first with 10% sulfuric acid solution to clean, then washed with water clean, deionized water was added and the desired KR-04 concentrate, stir, measured for pH, if the pH value is not within the range of 3.8-4.0, it is adjusted to the range of 2. pH:. 3.8-4.0 pH Adjustment: with 5% sulfuric acid or 1% sodium hydroxide slow adjustment. 3. treatment temperature and time concentrations temperature treatment time use KR-04 100ml / L 30 ~ 40 ℃ 1min 2min used for coating the bottom anti-corrosion treatment room -30 ℃ 1.5min 3min used for coating the bottom anti-corrosion treatment 4. Spray pressure; 1.5-1.5bar 5. Filtering; necessary to use, preferably five cycles of two hour recommended treatment process aluminum (silicon content <1%): degreasing (KR05) - washing -. - In addition to the gray stains (KR106) - washing - passive (KR-04) - washing - dry sour skim (KR06) - washing - alkaline etching - water washing - Clay go gray (KR106) - washing - passive (KR-04) - washing - dry sour skim (KR06) - washing - passive (KR04) - washing - drying aluminum die-casting: Acid degreasing (KR06) - Washing - Clay go gray (KR112) - washing - passive (KR-04) blasted pieces - low erosion skimmed (KR05) - washing - passive (KR-04) - washing - - Dry blasting pieces - low erosion skimmed (KR05) - washing - acid activation - washing - passive (KR-04) - washing - drying