...Pitting of stainless steel can be found in paper machine white water although it is considered as a mildly corrosive environment. Chloride, sulfate, and thiosulfate ions could be present in paper machine white water. A small amount of thiosulfate is introduced into white water when hydrosulfite...

... about 6.0. All anions were added as sodium salts. This low chloride solution had previously been found to readily pit 304L ( 1 , 2 , 7 ) and is typical of a more aggressive paper machine water system known to cause pitting in paper machines. Bicarbonate ( HCO 3 − ) additions up...

.... Microbially induced corrosion stainless steels welds thiosulphate pitting paper machine Alloys In paper machines the recycling of the process waters results in more concentrated white water and in the risk of microbially induced corrosion (MIC) of stainless steel (SS). The most harmful microbial...