Why Gui has to be coated with an insulating material

Why plating chemical degreasing to weak acid etching from the middle to go through the rinse?
A: Because the general chemical degreasing solution is alkaline, if the degreasing solution is directly brought into the acid etching solution, will an acid, a base neutralization reaction, reducing the acid concentration and effect. Neutralization reaction product adhering to the workpiece, will affect the quality of the coating. Tungsten eletrode, the workpiece in the chemical degreasing, be sure to rinse with water after, to enter the acid etching solution.
7 galvanizing glitches, coarse, usually those causes, how to solve?
A: The coating glitches, coarse, mainly by plating suspended impurities caused by pollution. Their sources are: air, dust, anode sludge, metal impurities hydrolyzate. In addition, the bath composition and abnormal operating conditions and so undesirable. The solution is: alignment bath composition and operating conditions. If it is caused by suspended impurities, they should be filtered bath.
8 plating solution formulated the basic procedures How to:
A: The basic procedures for the preparation of the plating solution is as follows:
(1) will be required for a good amount of juice into the open chute before plating drugs (small tank) inside, then add the right amount of water dissolved careful not to drugs directly into the plating tank.
(2) solution of impurities can be cleared with a variety of chemical methods, and activated carbon treatment.
(3) stand a good solution has been processed, filtered into a clean plating bath, add water to a standard amount.
(4) regulate the plating process specification (pH, temperature, additives, etc.).
(5) Finally, the electrolytic deposition of a low current density in order to remove other metal ion impurities, until the solution is suitable for operation so far.
9 Why Gui has to be coated with an insulating material?
A: In addition to the general hook hanging with Molybdenum crucible and product contact with conductive parts, the rest should be coated with an insulating material to reduce the current loss and metal loss, ensure the effective area of ​​plating, improve the effective current, and to hang with durable.