PROCESS EFFECT OF GALVANIZING

If the amount of silicon, % 0.20 x2 exceeds the amount of phosphorus and silicon, or 0.25% of the total amount of' I if it exceeds a higher risk of gray coating. If the amount of silicon,% 0.20 than x2 exceeds the amount of phosphorus with silicon, or the total amount of 0.25% if it exceeds a higher risk of gray coating.

An interesting feature is the steel in contact with molten zinc, while the amount of silicon real activity variable has a gray coating. For example, the amount of silicon, 0.03% lower than the effect is minimal. 03% of the skin up, the reaction gradually increases, reaches its peak around 0.08%, then decreases. 0.1% to 0.3% silicon, up to the levels produced exceeds a certain minimum thickness of the coating normally provides good tackiness. Once the amount of silicon and 0.3% if it exceeds the alloy hot-dip galvanizing layer formation is accelerated, thicker and more brittle so that the coating consists of a time. Curve Chair is based on this effect. This shall not be excessive transfer of molten zinc immersion, the amount of silicon steel which is between 0.1% and 0.3% provided a thicker coating, but they have acceptable adhesion properties. These coatings are often dull uniform gray color to gray or two pieces that show variable features, such as state exhibits a surface appearance. From place to place following the aging of the coating with silver and pale gray to gray, and black becomes dull views. Because this kind of a minimum of galvanized coatings are thicker than conventional coatings determined, corrosion resistance and extended life of the free housing.

For aesthetic reasons, attractive surface finish is required, less reactive steels (aluminum killed) is recommended.

Exceeded levels of reactive coating of silicon on the rate of the steel are disrupted, impeding the delta alloy layer on the surface remains unchanged for example, and approximately 25% of the original coating is not impaired. This is useful in repairing damage processing.