Will there be electrochemical corrosion when Q235-A and 304 come into contact?
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In one of the projects I am working on, there is a container that needs to be reused. The original material of this container was Q235-A; now, corrosive liquids need to be stored in the lower part of the container. Therefore, the fittings used for connecting to this container should be made of stainless steel 304. But won’t electrochemical corrosion occur when the flanges made of Q235-A on the equipment come into contact with the 304 pipe flanges? What should I do?
Electrochemical corrosion is related to the fluid; just pay attention to choosing the right welding rod.
Connecting stainless steel flanges with carbon steel flanges should be no problem; changes in the pipe material grade usually occur at the flanges.
I think there is still a certain impact. The corrosion resistance of 304 is fine, but that of Q235 is somewhat inferior; therefore, the surface of Q235 should be treated to prevent corrosion. Painting it would be a good solution
Using insulating full pads will suffice
There should be no problem; our factory does this all the time. As long as proper anti-corrosion measures are taken, it’s fine
Haha, Q235 also has corrosion resistance; it’s best not to put Q235 and 304 together, as rusting will damage the passive layer on the surface of 304.