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Reduction mechanism of sodium hypophosphite on nickel sulfate and nickel chloride

Sodium Hypophosphite, Nickel Sulfate, Lactic Acid, Nickel Chloride, Citric Acid, etc. are several common raw materials in the chemical nickel plating, chemical copper plating, chemical galvanizing process. How is the chemical plating solution proportioned and how does it work? These questions have a lot to do with the quality of sodium hypophosphite, nickel sulfate, nickel chloride. Sodium hypophosphite on nickel sulfate, nickel chloride reduction mechanism is how? Let's discuss it briefly.


NaH2PO2 .H2O is a +3-valent phosphorus ortho-salt, with relatively good reducing properties, good stability, and very good solubility in a variety of aqueous solution additives. Nickel in Nickel Sulfate, Nickel Chloride has an important role in surface treatment, anti-corrosion, rust prevention, and gloss enhancement. How to turn nickel ions into metallic nickel is the more critical part of chemical nickel plating. Let's look at the following reaction formula to know the mechanism of reducing nickel sulfate and nickel chloride.

Ni2+ + H2PO2-+ 1H2O → Ni +1H2PO3-+ 2 H+


The above reaction only illustrates the reduction of sodium hypophosphite on nickel sulfate, nickel chloride, as for the ratio of the two formulations in chemical plating, other additives such as lactic acid, citric acid, according to each chemical nickel plating solution composition and formulation of different will have a greater difference.


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