TongGun barrel plating solution of copper is actually easier for increasing number of a kind of impurity, given that, it will to a large extent also is actually is the same and metallic impurity such as iron, which, in its line in large part is also reduce the conductivity of TongGun tube on the solution, thus, its in large part on the line, that is, can make the light chrome layer area Narrows, coverage is also decreased.

Because the copper roller will belong to the inner hole, it is because of this, when it is electroplating, on its chromic acid corrosion oxidation, that is, will stain the plating solution. In view of this, when the mass concentration of copper impurities is relatively high, the temperature of the bath will remain the same. Generally speaking, the current density will be directly adjusted to 18A/dm2 or 20A/dm2.

In this way, on the copper roller coating in fact, there will be no more obvious impact. At the same time, to a large extent, it can adjust the mass concentration of chromium anhydride directly to the upper limit of the process (250g/L), so as to relatively reduce the mass concentration of impurities, thus improving the coating quality.

However, the mass concentration of copper impurities must be paid attention to must be controlled under 6g/L, which is an important factor in copper roller chromium plating. In this way, to a large extent, it should be noted that a series of methods should be used to control or slow down the accumulation of copper impurities.

After, on the inner wall of the copper roller is actually coated with a layer of insulating paint film, after 24h drying is electroplating. This film, to a large extent, actually inhibits the corrosion and oxidation of chromic acid on the inner wall of copper. About the fixture on the copper roller, that is to say, it will be made of iron materials, which is more common actually refers to the splint at both ends and the center fixed screw.