Corrosion which take place in steam boilers is usually localised, leading to pitting or corrosion cracking rather than attack of a general nature, although this may be encountered in boilers due to the presence of acid conditions. For this reason Dr. Parkins confines his remarks to localised corrosion and in the following extensive article, specially written for Corrosion Technology, he discusses in Part I types of pitting corrosion. Next month corrosion associated with high concentrations of caustic soda viz. caustic cracking, corrosion fatigue and deterioration due to local overheating will be discussed.
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