Application of zinc metal in the field of anti-corrosion-C

11-11-2020

The corrosion resistance is good, the combination is meticulous and uniform, and the corrosive gas or liquid is not easy to enter the interior.

The zinc layer is relatively pure, and it is not easy to be corroded in an acid or alkali environment. Effectively protect the steel body for a long time.

 After chromic acid passivation, it can be used in various colors, which can be selected according to customers' preferences. Galvanizing is beautiful and decorative.

The zinc coating has good ductility and will not fall easily during various bending, handling and impact. Its dry film contains more than 96% total zinc content, and cold galvanizing can provide good cathodic protection for steel. Even in a very harsh environment, it can still protect the steel surface for a long time. The anti-corrosion performance can be comparable to or even better than that of hot-dip galvanizing. In addition, cold galvanizing is composed of high-purity zinc powder, resin and organic solvents. It does not contain heavy metals such as lead and mercury. The organic solvent contains less volatile VOC emissions and extremely low environmental pollution.

Thermal zinc spraying is to first blow sand particles to the surface of the workpiece to remove the rust and oxide scale on the surface of the workpiece using high-pressure air and pipes, and then use oxygen, acetylene or electric heating sources (large workpieces are heated by electricity, and small and medium-sized workpieces are heated by oxygen and acetylene). Air and special tools (spray gun) spray zinc atomized ultra-high speed to the metal surface. Although the initial investment is larger than spray paint, spray paint needs to be maintained after two or three years. In the long run, the manpower and material costs are much higher than thermal spray zinc.


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