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What are the causes of the rough surface of 304 stainless steel angle?

Time:2022-03-28 Source:Wuxi Jianuo Special Steel Co., Ltd.

What are the causes of the rough surface of 304 stainless steel angle?

The surface layer of 304 stainless steel angle is not smooth, there are a lot of basin friends for this matter is not very well understood. The reason is that this kind of surface rough hot dip galvanized layer is generally thicker than the bright and clean, so the corrosion resistance life is also longer. Then the following angle manufacturers to introduce you to the cause of 304 stainless steel angle surface roughness what it.

First, the plating pre-treatment method caused by “over pickling passivation”, the impact on the surface roughness of the angle iron hot dip galvanizing layer. “Over pickling passivation” makes 304 stainless steel angle surface roughness or cause bean marks, which is also the cause of the product workpiece hot dip galvanized surface roughness.

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Angle steel manufacturers

Second, the zinc liquid temperature is too high or too long time to dip zinc, the impact on the surface roughness of the angle iron hot dip galvanized layer.

When the zinc liquid temperature is too high or the zinc dip time is too long, or because of the influence of the angle iron composition and the effect of St. Derring, so that the Zn-Fe aluminum alloy phase into too much or disproportionate, will also lead to surface roughness. The thicker the hot-dip galvanized layer the more the surface layer is very easy to look unsmooth.

Third, angle steel manufacturers angle iron production and manufacturing using 304 stainless steel angle composition or surface layer standards, the impact of the angle iron hot dip galvanized layer surface roughness.

Hot-dip galvanized layer surface finish and not smooth, is relatively speaking. Unlike “continuous hot dip galvanizing” of thick steel plates, seamless steel pipes or stainless steel wires, hot dip galvanizing of steel angles is classified as a high-volume hot dip galvanizing process, where the hot dip galvanized layer is not blown through a defoamer. If the hot 304 stainless steel angle commonly used 304 stainless steel angle surface is not smooth and uneven, rust pits or significant cold-rolled pattern, hot dip galvanizing is carried out, the surface layer is generally not easy than the original more flat and smooth.