Selection of welding electrodes for welding alkaline desulfurization solutions containing elemental sulfur
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The title is a bit wordy, huh. It is that when there is a leak in the alkaline desulfurization solution system, welding repairs are required; during this time, the desulfurization solution cannot be completely removed, and some amount of it continues to interfere with the welding process at the repair site. The material at the leakage site is usually ordinary steel plate Q235; welding electrodes of types 422, 302, and 427 do not work. Welding must be done without desulfurization fluid. Is there currently any welding rod specifically designed for this situation?
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I’m not a professional in mechanics, but I feel that welding in this way won’t work well. If the leakage is not severe, a skylight can be created in large-diameter pipes: weld the bottom first and then the top. My previous approach was to heat both sides of the weld with an acetylene flame before welding, in order to decompose the sulfur, and then carry out the welding