Nickel phosphorus alloy
Electroless nickel-phosphorous alloy coating can obtain uniform, compact and bright nickel-phosphorous alloy coating with metallic luster. Due to its high hardness, uniform thickness and excellent wear resistance, it is widely used in industry. It is suitable for nickel plating on metal surface (such as: iron, stainless steel, aluminum, copper, etc.), and it is also suitable for nickel plating on non-metallic surface, without expensive palladium deposition, with low cost. For example: ceramic nickel, glass nickel, diamond nickel, carbon nickel, plastic nickel, resin nickel, and so on. Tank maintenance is simple. Low cost, no need for plating equipment.
1, corrosion resistance: the process after the treatment of the metal surface amorphous coating, corrosion resistance is particularly good, sulfuric acid, hydrochloric acid, caustic soda, salt water test, the corrosion rate is lower than 1cr18ni9ti stainless steel.
2. Good wear resistance: since the surface after catalytic treatment is amorphous, i.e. in the basic plane state, it has self-lubricity. Therefore, the friction coefficient is small, good non-adhesion, high wear resistance, in the case of lubrication, can be used instead of hard chromium.
3, high gloss: catalytic plating after the surface gloss for lz or Poland 8-10 can be comparable to stainless steel products, white and bright stainless steel color. Workpiece coating, surface smoothness is not affected, no further processing and polishing
1, pre-treatment of the workpiece: pre-treatment is very important for the quality of coating, to make the surface of the workpiece before plating no pollution, and is in the active state, the process mainly includes: oil removal, rust removal, polishing, washing.
2. Pickling activation: soak the workpiece with pickling activator for 2-3 minutes, and then wash it clean.
3, with hot deionized water to wash the workpiece, the workpiece temperature, to avoid the next step of plating, cold workpiece absorption of plating solution heat and cooling, resulting in stop plating.
4. Hang them in the plating bath in accordance with the loading ratio of 0.5-1.5dm2/ l, and control the bath temperature at 85-92 ℃.
5, the process of plating should have a moderate light stirring, so that the temperature and the distribution of bath evenly, so as to ensure the stability of electroless nickel plating, and the consistency of the coating. At the same time, the bath should be filtered by circulation. Filter screen: aperture 1-8 micron, resistance to 100 degrees Celsius, acid resistance.
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