Zinc-nickel seeping layer ferrous metal corrosion protection process
A technology of ferrous metal and infiltration layer, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of affecting the mechanical properties of the substrate, pollute the environment, low storage hardness, etc., achieve good weldability, Good wear resistance, uniform thickness and dense effect
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[0018] 1, process step of the present invention is:
[0019] (1) Alkali washing and degreasing - carry out alkali washing and degreasing treatment on the ferrous metal substrate, and the pH value of the degreasing cleaning water is 7.5-8.5;
[0020] (2) Shot blasting and derusting - carry out shot blasting and derusting treatment on the ferrous metal after the first step of treatment;
[0021] (3) Heating the infiltrated layer - put the zinc-nickel infiltrated layer and the metal substrate in a sealed metal container to heat the container, and rotate the container while heating, the rotating speed is 5-10 rpm, and the heating temperature is 370°C-450°C, Among them, the zinc-nickel coating is formed by uniformly mixing the powder components in the following mass ratio, Zn powder 20-30%, Ni powder 0.5-1.4%, Al powder 3-12%, rare earth 2-6%, NH 4 Cl ammonium chloride 1~4%, the balance is Al 2 o 3 powder;
[0022] (4) Wash with water to remove ash to obtain the finished produc...
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