plating

  • Explain the principle of electric oil removal
    Explain the principle of electric oil removal

    When the oil is de-energized, no matter whether the part acts as a cathode or an anode, a large amount of gas is deposited on the surface. This process is essentially the electrolysis of water:2H2O=2H2↑+O2↑When the workpiece acts as an anode, the surface is oxidized and oxygen is evolved:4OH--4e=O2↑

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  • What are the methods commonly used in factories to determine the pH of a solution?
    What are the methods commonly used in factories to determine the pH of a solution?

    The pH value is an important parameter of the plating bath, which has a great influence on the electroplating process, so it is necessary to check the pH of the bath frequently. There are two methods commonly used in factories to determine the pH of a solution:(1) Test paper method: According to the

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  • What is the pH of the bath?
    What is the pH of the bath?

    The pH of the bath refers to the acidity of the solution. We know that water is a weak electrolyte and it can also be ionized.The ionization degree of water is very small. Under normal conditions, only one mole of water is ionized in 10 million liters of water, that is, the concentration of hydrogen

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  • Why should metal be electroplated?
    Why should metal be electroplated?

    When metal is used in a variety of different environments, metal corrosion occurs due to the chemical and electrochemical effects of the external medium on the metal surface. The result of metal corrosion is not only the loss of the metal itself, but also the loss of use value due to the damage of t

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  • What is the role of boric acid in nickel plating solution?
    What is the role of boric acid in nickel plating solution?

    Boric acid is a buffer for nickel plating solution and acts as a buffer for the pH of the bath. When the concentration reaches 31 g/L or more, it has a significant effect, but it cannot be too high because the solubility of boric acid at room temperature is about 40 g/L. Due to the buffering action

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  • What is the role of sulfuric acid in copper sulfate solution?
    What is the role of sulfuric acid in copper sulfate solution?

    The sulfuric acid in the copper sulfate solution has the following effects:(1) Prevention of hydrolysis of copper to form precipitates of cuprous oxide or other basic salts.(2) Reduce the effective concentration of copper ions to make the crystal of the copper plating layer fine.(3) Reduce the resis

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