Qingdao Hongan Surface Material Technology Co., Ltd. is committed to manufacturing professional products, continuous innovation and manufacturing, to provide customers with professional services.

Product Features
--------

1. Can be used at room temperature.
2. Has "self-healing" properties similar to hexavalent chromium.
3. The process range is extremely wide, PH = 1.4~3.4 can work normally, and uniform color can be obtained in 30 to 120 seconds.
4. It has strong high temperature resistance and does not change color at 250°C
5. The passivation film does not contain hexavalent chromium, which has passed the SGS standard test and conforms to the EU ROHS, WEEE and ELV regulations.
6. With the company's alkali zinc process, neutral salt spray time can exceed 500 hours

Product characteristics
--------

Treatment conditions

management method
--------

The passivation solution is generally managed by adjusting the PH value or the treatment area, and the two are used as much as possible. When the concentration of the passivation solution decreases, the color tone of the surface film becomes thin. As the concentration increases, the color tone tends to become thicker. But basically relatively thin
Replenishment according to pH measurement (glass electrode pH meter)
It is necessary to maintain the PH value at the opening concentration, and add nitric acid (67% content) with the mixed solution of HK-203 acid and nitric acid, which is 1/3 of the HK-203 supplementary amount.

Replenish according to the change of treatment area (take-out amount is calculated as 3.0ml/dm)
3.6 dm²/1 (0.3 ml/dm²) for supplementary HK-203
1.2 dm/1 (0.3 ml/ dm) nitric acid 68% to supplement
· PH management range (when the standard cylinder opening agent is 100m1) is in the range of 1.5 to 3.0, and PH is managed.
Replacement of passivation solution
When the concentration of zinc in the passivation bath increases, it will cause color spots and low corrosion resistance. When the concentration of zinc in the passivation bath is not higher than 8g/1, it is the limit, and the dissolved amount of zinc in the electroplating bath is about 10mg/dm2
(Standard opener 100 m1/1,25 degrees 60 seconds polyethylene basket passivation)

Method of use
--------

Electroplating
Electroplating layer thickness, need to be above 6um
Due to the different electroplating liquid and glossing agent, the appearance, color tone and corrosion resistance will be different. It is recommended to use HK potassium gasification zinc plating additive and HK cyanide-free alkaline additive of our company for better effect.
out-of-light activation
When the concentration of zinc and iron increases, it will cause the haze of the passivation film. Must be updated regularly
Wash
After activation, water washing shall be carried out fully, and the activated liquid shall not be brought into the mirror liquid.
Trivalent chromium passivation treatment
The material of the basket, the net and the strength of the stirring will affect the tone of the chromium passivation film, please pay attention. If there is metal workpiece falling off in the passivation liquid, it may cause the increase of zinc, iron and other components, and the chemical liquid may become waste, so it is necessary to pick up the falling metal workpiece.
Drying
Drying conditions have an impact on corrosion resistance and discoloration of the film after time. Drying is recommend at 80 degrees for more than 10 minutes.
When the articles with water marks just finished are dried at high temperature, the corrosion resistance will be low, and the corrosion resistance after drying must be avoided.