Comparison of acid and alkaline zinc-nickel alloy plating processes

- Sep 13, 2018 -

The characteristics of acid zinc-nickel alloy plating and alkaline zinc-nickel alloy plating are similar to those of acid zinc plating and alkaline zinc plating.

The main advantages and disadvantages of the two processes are compared below.

Advantages of alkaline zinc-nickel alloy plating:

1. The uniform plating ability (dispersion ability) is good, and the coating thickness distribution is relatively uniform.

2. The difference in nickel content in the coating between the workpiece high and low current density regions is small.

Disadvantages of alkaline zinc-nickel alloy plating:

1, the current efficiency is low, generally about 50%, the plating deposition rate is slow, about 0.25 microns / min.

2. High production and operation costs.

3. It is relatively difficult to keep the plating tank running normally.

4, can not be coated with cast iron, carburized steel, high carbon steel.

Advantages of acid zinc-nickel alloy plating:

1, the current efficiency is high, generally about 90%, the deposition speed of the coating is fast, up to 1.0 micron / min.

2, the production and operation costs are low, teach the alkaline process is low 50 & so.

3. It is relatively easy to keep the plating tank running normally.

4, can be coated with cast iron, carburized steel, high carbon steel.

Disadvantages of acid zinc-nickel alloy plating:

1. The uniform plating ability (dispersion ability) is relatively low, and the uniformity of the thickness distribution of the plating layer is relatively poor.

2. The nickel content in the coating of high and low current density areas of the workpiece varies greatly.

Previous: How to choose acidic and alkaline zinc-nickel alloy plating process Next: Corrosion resistance of zinc-nickel alloy coating

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