Research status of aluminum alloy corrosion types and thermal spraying technology
Aluminum alloys have been widely used in the field of marine engineering due to its good machinability and corrosion resistance.However,when aluminum alloys are serv-iced in marine environments with high salinity and high humidity,the passivation film on its surface will be damaged,and the matrix will be in direct contact with seawater,resulting in electrochemical corrosion.In this paper,corrosion types and characteristics of aluminum al-loys in the marine field have been described,focusing on pitting corrosion,intergranular cor-rosion,stress corrosion and crevice corrosion.To reduce corrosion,surface engineering tech-nology can be used to improve the surface corrosion properties of aluminum alloy.Thermal spraying technology has become one of the preferred technologies in the field of marine corro-sion protection due to its simple process,strong coating corrosion resistance,and ability to meet corrosion protection requirements of various structural shapes and materials.The paper has reviewed the principles and characteristics of flame spraying,plasma spraying,arc spra-ying,explosion spraying and other processes,as well as the current research status.
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