CORRELATION OF CORROSION DATA FOR WELDED STEEL -ABSTRACT

Three test methods,namely immersion tests, galvanostatic anodic dissolution tests and the scanning vibrating probe technique,have been evaluated as adequate methods for ascertaining the susceptibility of welds in carbon steels to preferential corrosion. The used of hardness measurement by profiling and mapping was also evaluated. Three welds were tested for which the production has been controlled to produce difference types of corrosion behaviour. In addition a weld that had failed in service was used to validate the finding of the assessment.In the immersion test lasting nine months,the tree controlled sampled welds exposed to ASTM D114 seawater behaved as expected,in terms of which region of the weld was most susceptible to corrosion.