Acid Potassium Chloride Zinc Electroplating Softener

The effect of organic impurities The decomposition of additives and the accumulation of grease will produce organic impurities. If the content of organic impurities is too high, the coating will become dark or produce stripes, and the brittleness will increase. The coating will mist and not shine after passivation, and the covering ability will be reduced and the coating will be rough. The treatment method is to increase the bath temperature to about 45℃, add 3g-5g/L activated carbon, stir for 30 minutes, stand filtration. After activated carbon treatment, the additive will also lose a part, must be appropriate to add, add the amount of hull slot to determine.

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Description

Coating performance evaluation index

Coverage capacity: refers to the full coverage capacity of the coating, also refers to the depth capacity

Uniform plating capacity: high, medium and low area coating thickness uniform ability.

Leveling ability: The better the leveling, the better the brightness

Corrosion resistance: refers to the corrosion resistance of the coating, coating rust resistance is mainly related to the thickness of the coating and the sealing film. Potassium chloride galvanized layer rust prevention ability is very poor, galvanized layer of closed passivation can prevent oxygen and moisture in the air from penetrating into the coating, prevent rust.

Bath formula and technological parameters

	concentration range	Standard concentration
KCl	200-230 g/L	220g/L
ZnCl	60-100 g/L	60g/L (barrel)
Boric Acid	30-40 g/L	35 g/L
HL-93 Softening Agent	20-30 g/L	25 g/L
HL-93 Brightening Agent	0.6 ml/L- 1.0 ml/L	0.8ml/L
Temperature (℃)	10-55℃	40℃
PH value	4.8-5.6	5.2
DK (A/dm2)	0.1-5	3

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