New technology of direct electroless nickel plating for automotive aluminum wheels (2)

If supplements can only handle 10 square meters more. Annual need to sink 15000 liters of zinc. (About 1.5 kg per liter of zinc sinking agent, and 22.500 kg of zinc sinking agent per year. The price of zinc sinking agent per kg is 60.00 yuan, and the price per liter is 90.00 yuan). The total amount is about 1.35 million in the whole year. Aluminum wheel direct electroless nickel activator can be used for a long time after being supplemented and adjusted. The sink zinc agent can not be used for a long time. The use of direct electroless nickel activators can save companies about 1 million yuan annually. (The above price is a virtual price)

V. How to use:

Activator 300-400 ml

Deionized water 600-700 ml

Operating time 3 minutes

Operating temperature 30-50 degrees

PH value 6-7 Note: adjust the PH value with ammonia

Six, operating specifications:

1, aluminum wheel direct plating process

In addition to wax - washing - cathode degreasing - washing - weak corrosion - washing - descaling - washing - activation - electroless nickel - washed - copper plated - washed - semi-bright nickel - high sulfur nickel - bright nickel - nickel seal - Washing - chrome plating

2, aluminum wheel secondary zinc plating process

In addition to wax - washing - cathode degreasing - washing - weak corrosion - washing - descaling - washing - a sinking zinc - washing - dezincification - washing - secondary zinc sink - washing - pre-nickel plating - washing - copper plating - washing - Semi-bright nickel - high sulfur nickel - bright nickel - nickel seal - washed - chrome

3, aluminum wheel flash electroless nickel process

Weak corrosion - Washing - Descaling - Washing - Activation - Flash electroless nickel plating - Washing - Acid activation - Washing - Plating acid bright copper or other metals

The advantage of applying new technology directly to electroless nickel plating on aluminum wheels is that it can eliminate the secondary zinc replacement process and simplify the technology management, bath management, and waste water treatment. After the aluminum hub is activated, it can be electrolessly plated with nickel or flash electroless nickel plating with only one wash or no water washing, which can enhance the bond strength of the coating, reduce porosity, and improve corrosion resistance. The use of an activator for direct electroless nickel plating or flash electroless nickel plating on aluminum hubs completely overcomes intergranular corrosion caused by residual liquids in pinholes, trachoma, small process holes, blind holes, etc. on the surface of aluminum wheel hub parts. Plating and other shortcomings. The major advantage of using an aluminum hub for direct electroless nickel plating activators is that there are both plating layers where the activator is immersed. Thoroughly solved the lateral corrosion between the substrate and the coating caused by the secondary zincation process, and eventually caused the problem of peeling of the coating.

The application of direct electroless nickel plating on aluminum hubs and the use of new direct electroless nickel plating processes have resulted in simple operation procedures, ease of use, and technical freedom. The finished product rate is as high as 98%. Protect the environment, benefit the country and the people. Save time, effort, greatly improve the production efficiency, save a lot of money, reduce the operating costs of the company, to the company has brought incalculable comprehensive economic benefits. This will enable companies to keep pace with the times in the global economic recovery and the fierce competition in the automotive aluminum plating industry, and coexist with knowledge innovation.

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