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In the late 1980s, a new type of corrosion appeared in drinking water installations where galvanized steel pipes failed forming a deep groove with no corrosion at the other surfaces. The reason was discussed quite fiercely between failure analysts and material suppliers. In the end the discussion lead to the solution: inductive welded pipes of a certain sulphur content were prone to selective corrosion. The history of the arguments is discussed using old communications between Wilhelm Schwenk and Wolfgang Stichel, who later published the results in a paper unfortunately only I german.
Thus the knowledge got lost and new cases based on the same material problems are observed in application of so-called C-Steel piping systems. Failure cases are shown.
Die Korrosion in ihren zahlreichen Erscheinungsformen beschäftigt Fachleute und Laien. Um-so wichtiger ist es, die einzelnen Phänomene korrekt und eindeutig zu benennen. Nur so kann man eine saubere Beschreibung der Korrosionsvorgänge erreichen und damit in der wörtlichen und schriftlichen Kommunikation richtig verstanden werden. An zahlreichen Beispielen wird der richtige und normgemäße Sprachgebrauch beschrieben.
Susceptibility of 304 stainless steel to crevice corrosion in electrochemically active fluids
(2019)
The susceptibility of AISI 304 stainless steel to crevice corrosion on the effect of contact with electrochemically active fluids was investigated using exposure and stepwise potentiostatic polarisation. Crevice materials made up of 304 SS and Polyether ether ketone (PEEK) forming two kinds of crevices including 304 SS-to-PEEK and 304 SS-to-304 SS were tested.