How to avoid corrosion caused by potential differences resulting from contact between different materials
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In the coal gasification industry, the pipes used for transporting pure oxygen are generally made of 304 stainless steel. Our company uses bolts made of ordinary materials to secure the flanges, which leads to corrosion due to differences in potential. Those involved in coal chemical production are aware that the pressure in oxygen pipelines is quite high, usually around 7–8 MPa. As a result of bolt corrosion, these bolts may not be able to withstand such high pressures and could break. This situation can have serious consequences. Do you have any good suggestions for solving this problem, so that the bolts can withstand high pressures without requiring overly expensive materials?
Fluorinated lining could be considered; feel free to contact us for more details.
Can fastening bolts of the same material be used?
It’s not possible, because bolts made of austenitic stainless steel do not have sufficient mechanical strength; in other words, their hardness is not high enough, and they are generally unable to handle high-pressure pipe connections.
Perform surface treatment on the bolts, such as nickel or chromium plating； Or blue treatment ； Or apply a coat of paint.
Hello, my company has developed a bolt anti-corrosion tape that is very easy to apply and comes at a low cost. If you are interested, you might want to learn more about it – it could possibly solve your problems