Category Archives: corrosion

Intergranular corrosion of a martensitic stainless steel

Martensitic stainless steel (420B) microstructure show carbides precipitate at grain boundaries. Chromium, present in the matrix to guarantee corrosion resistance, is taken away to form chromium carbides. This causes a strong reduction in the corrosion resistance just near the carbides. This … Continue reading

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Stress corrosion cracking of an austenitic stainless steel

Achilles’heel of austenitic stainless steel is stress corrosion cracking. This steel family, born to sove any problem in corrosion is particularly susceptible to SCC in mildly  aggressive chloride environments. In the image the typical aspect of a SCC crack. It propagates normal to the applied … Continue reading

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Stress corrosion cracking of cabon steel plate

Stress corrosion cracking on a carbon steel. Stress corrrosion cracking is a material failure that present a rapid crack propagation. SCC happens in a particular environment, for a particular material in presence of tension stresses. The image, taken during the tuna can steel failure … Continue reading

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