Corrosion failure analysis

summary

Corrosion failure: corrosion refers to the damage phenomenon caused by chemical or electrochemical reaction on the surface of metal or alloy materials. Although metal corrosion plays a beneficial role in pickling, chemical power supply, electrolytic machining, metallographic etching and so on, the losses caused by it in the national economy are quite serious. The phenomenon that mechanical components lose their original design function due to corrosion is called corrosion failure.

The types of corrosion failure include: direct chemical corrosion failure; Electrochemical corrosion failure; Pitting corrosion failure; Local corrosion failure; Intergranular corrosion failure; Selective corrosion failure; Crevice corrosion failure; Biological corrosion failure; Wear corrosion failure; Hydrogen damage failure; Stress corrosion failure, etc.

Corrosion failure analysis items

★ failure site information investigation (including background material collection)

★ preliminary study on failure events

★ preliminary judgment of failure mode

★ determine specific analysis ideas and work procedures

★ implement the work procedure to find out the cause of failure

★ comprehensive analysis of failure causes