Reasons for black side of hot strip galvanizing
The content of zinc chloride in plating bath is too low, which leads to some parts can not be plated and lead to local blackening.
Luoyang Taihong hot galvanizing factory to tell you the reason, the emergence of the black side of reason is generally divided into: contains too much iron impurities of galvanized steel strip into the liquid, thus causing blackening; resulting in the high current hot galvanized steel blackening;
Solution: contains too much impurity in the bath can use saline and Potassium Permanganate rushed ang impurity, or adding zinc chloride solution to current economic treatment; the strict monitoring of the production process to prevent the emergence of this phenomenon; low content of zinc chloride can be solved by adding zinc chloride.
