DIN 603 Bolt Hot-dip Galvanizing Chemical Treatment

First, hot-dip galvanized DIN 603 bolt features
The hot-dip galvanized DIN 603 bolt is obtained by immersing the rust-removed steel in a zinc solution melted at about 500 ° C to adhere the zinc layer to the surface of the bolt to prevent corrosion. The galvanized layer is relatively strong. The galvanized layer is relatively strong. Cold galvanizing, relatively no heating, little galvanizing, galvanized parts are easy to fall off when exposed to moisture. The fundamental difference between hot-dip galvanizing and cold-galvanizing is: Hot-dip galvanizing, also known as hot dip galvanizing, melts the zinc ingot by high temperature, puts the auxiliary material, and then immerses the metal structural member in the galvanizing bath. The advantage of hot-dip galvanized DIN 603 bolt is that it has strong anti-corrosion ability. The hardness of the galvanized layer of the bolt is better. “Cold plating” means “electroplating”, that is, the zinc salt solution is electrolyzed, and the plating part is coated without heating. The amount of zinc is very small, and it is easy to fall off when it is wet. Hot-dip galvanizing is a chemical treatment and belongs to an electrochemical reaction. Cold galvanizing is a physical treatment, only a layer of zinc is applied on the surface, so… Hot galvanizing is the galvanization of the steel surface under hot dip conditions. It has strong adhesion and is not easy to fall off. Hot galvanizing Although the tube also shows rust, it can meet technical and sanitary requirements in a long period of time.

First of all, the difference in process is that hot-dip galvanizing is to remove the oil, pickle, dipping, drying and immersing in the melted zinc solution for a certain period of time.

Second, hot-dip galvanizing has the following advantages compared with electro-galvanizing

(1) It can produce a thick coating layer, and has both a pure zinc layer and an iron-zinc alloy layer, so the corrosion resistance is good;

(2) The production efficiency of hot-dip galvanizing is particularly high; the time for the parts staying in the galvanizing hot bath is short

(3) Compared with electro-galvanizing, hot-dip galvanizing has lower production costs and has less impact on the environment than electroplating;


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