BY-830 zinc calcium phosphating agent

Zinc-calcium phosphating is a phosphating solution that was used in large scale in the late 1970s and in the early 1990s. BY-830 is a phosphating agent which is a composite of zinc-calcium phosphating agent and further improved by film layer. It has fine and compact phosphating crystals, strong corrosion resistance, smooth and beautiful film layer, no need for surface adjustment, low bath cost, less sediment, high working fluid stability, long service life and low consumption. Film thickness1～3/µm，

After painting, the paint film has good color, high finish and low paint absorption. It is a phosphating solution with excellent performance. The quality is better than the medium temperature zinc system, and the cost is lower than that of the zinc manganese nickel system and the zinc system. The use of BY-830 for the zinc system used in each plant, zinc manganese system does not need to change the bath, directly into the product can be used and a smooth transition. Due to its many advantages, zinc-calcium has become the first choice for phosphating other than trications (zinc, manganese and nickel). It has great practical value and is easier to use and promote.

BY-830 can be applied to conventional paint or powder coating and phosphating treatment before negative electrode and anode electrophoretic coating, and it has good matching with various coatings.

BY-830 usage example

Example 1, less process, more complicated work with lumen, overlap, hemming, welding, assembly, gap

Degreasing; water washing; heating BY-200 cleaning; flowing water washing; BY-830; cold water or hot water washing; (pure water washing); rust or (saponification) immersion oil during painting or process

Example 2

Degreasing; water washing; strong acid derusting; water washing; neutralization; water washing; BY-830; cold water or hot water washing; (pure water washing) + painting or anti-rust treatment between processes

Embodiment 3

Room temperature strong acid + "two in one"; water washing; neutralization; water washing; BY-830; water washing; drying

Example 4: Black phosphating process for steel castings

Degreasing; water washing; BY-200; water washing; BY-830; water washing; drying

BY-830 distribution tank and control process parameters:

Appearance: light green liquid

Density: 1.4

Total acidity: >500 points

Type 1, thin film, 1-2 micron, is most suitable for electrophoresis and painting, and is suitable for precision parts with anti-rust requirements but high requirements on part assembly size.

Matching ratio: 9%

Acid ratio: 10-15

Total acidity: 20-30 points

Free acidity: 1.5-2.5

Operating temperature: 60-70 degrees

Type 2, high rust resistance, 3-5 microns, film color grayish black to black; type 3, high rust resistance, 3-5 microns, film color gray to dark gray. Basically no residue.

Matching ratio: 18-21%

Acid ratio: 9-12

Total acidity: 60-100

Free acidity: 5-10

Operating temperature: 60-70 degrees

[-1-]