Cracking was observed in a deaerator storage vessel following 11 years of service. A section of welded carbon steel plate was removed. Metallurgical analysis revealed a localized corrosion mechanism with extensive oxide formation. The oxide is non-protective. Defect formation appears related to oxide micro-cracking and subsequent corrosion.

Subject
Water, Secondary cracks, Photomicrographs, Storage, Metal oxides, Inspection, Corrosion cracking, Stress cracking, Corrosion products, Pearlite, Storage tanks, Deaerators, Cracks
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1986
Association for Materials Protection and Performance (AMPP)
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