Product Details
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HL-93 high temperature resistance potassium chloride zinc-plating softening agent
Packing specifications:25kg/plastic drum or 200kg/plastic drum or 1 ton plastic drum
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1. In the normal production process, potassium chloride, boric acid and zinc chloride are analyzed and adjusted once a week.
2. HL-93 brightener should be added according to the consumption of 60-80 ml per KA. h. When adding, it is necessary to dilute 2-3 times with plating solution.
3. HL-93 softener is generally only added when adding potassium chloride, each add 1 liter potassium chloride corresponding supplement HL-93 softener 80 ml or add 80 ml per KA. h.
4. In the normal production process, the PH value may be gradually increased, dilute hydrochloric acid can be used to reduce the PH value.
5. In the continuous plating process, the plating solution will accumulate a small amount of iron, at this time must be added to dilute hydrogen peroxide, and then filtered to remove iron impurities.
6. The first grade galvanized anode should be used. Absolutely can not use iron plate and stainless steel plate as insoluble anode, titanium blue will also be corroded, can not be used.
7. when the workpiece falls into the bath, it should be taken out in time, especially the rolling barrel must often use magnets to suck up the iron rot at the bottom of the bath.
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Common failures and processing method
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Problem Description
|
Probable cause
|
Solutions
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Poor brightness
|
Lack of brightener
Lack of softener
Organic
impurity pollution
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|
Brightener supplement
Softener supplement
Activated
carbon filtration
|
Poor coverage
No coating in hole and concave
|
Lack of brightener
Lack of softener
Low potassium chloride
The bath temperature
becomes higher
Aluminum
impurity pollution
|
Brightener supplement
Softener supplement
Potassium
chloride supplement
Lowering temperature
Treat with zinc powder
|
The bright range is narrow and the coating is easy to burn
|
The PH value of the bath increases
Lack of zinc
Lack of boric acid
Lack of softener
|
Adjust PH value with dilute hydrochloric acid
Zinc
chloride supplement
Boric acid supplement
Softener supplement
|
The coating has white mist
|
Effect of
organic impurities
Poor cleaning after plating
|
Activated
carbon filtration
Change the
cleaning water
|
The coating blackening after acid dipping
|
Iron impurity
Copper impurity
|
Hydrogen peroxide treatment and filtration
Treat with zinc powder
|
Roller holes appear in the coating
|
Lack of softener
Iron impurity
Excessive current
Lower zinc
Over loading of work
|
Softener supplement
Hydrogen peroxide treatment and filtration
Lower total current
Zinc
chloride supplement
Reduced loading
|
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