100 Questions on Basic Electroplating Knowledge (Part 1)
1.Why can electrolytes conduct electricity?Answer: The conductivity of electrolytes is different from that of metal conductors. In metal conductors, current is transported by the movement of free electrons, while in electrolytes, current is transported by charged ions. Due to the equal charge of positive and negative ions in the electrolyte, it does not exhibit electronegativity, which is called electrical neutrality. When we apply voltage to the electrolyte, due to the strong attraction of the electric field, ions run towards the electrodes with opposite polarity to themselves. Cations run towards the cathode, anions run towards the anode. Their movement allows current to pass through, which is the principle of electrolyte conductivity. What does Faraday’s law represent? Can you explain Faraday’s first law and second law?Answer: Faraday’s law describes the relationship between the amount of electricity passing through an electrode and the weight of the electrode reactants, also known as the law of electrolysis.Faraday’s first law: The weight of metal deposited during electrolysis is proportional to the current and time passing through the electrolyte. W=KItW – weight of precipitate (g) K – proportionality constant (electrical equivalent) I – current intensity (ampere) t – electrification time (hour)Faraday’s Second Law: When the same amount of current passes through different electrolytes, the weight of the precipitated metal is proportional to the chemical equivalent of each electrolyte. K=CEC – Proportional constant.E – Chemical Equivalent 2.During the electroplating process, is it due to the high temperature of the plating solution that causes the hanging fixture to heat up?Answer: Although the heating of the hanger is related to the temperature of the solution, the main reason is that: (1) the current passing through the hanger is too high. (2) Poor contact on the hanger, increased resistance and heating of the hanger. 3.What are the main factors controlling the…
