Welding issues with 316L tube bundles and Q345 tube sheets
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As the title suggests, what types of corrosion can occur during the welding of 316L tube bundles and Q345 tube sheets? The pipe runs for condensate water.
It is advisable to avoid welding dissimilar steels together for heat exchange tubes and tube sheets; as mentioned by the original poster, if 316L heat exchange tubes are used, then a composite tube sheet should be employed. The welding quality is very poor when welding dissimilar steels. It is recommended to change the tube sheet material and add a surfacing layer
In several heat exchangers I’ve seen before, when the materials of the tubes and the tube sheet were different, there was a surfacing layer on the tube sheet.
Heterogeneous materials are most prone to electrochemical corrosion, right?