Research Progress on Corrosion and Protection in Deep-sea Environment

Deep-sea environment is very harsh, and will have a huge impact on underwater vehicle and deep-sea device. This article discusses of the corrosion related factors in deep-sea environment such as the dissolved oxygen, pressure, salinity, temperature, flow rate etc. as well as their impact on the corrosion of metals, alloys and other materials, then comes to the conclusion that the dis- solved oxygen is the most important factor for the corrosion of metals and alloys. The research sta- tus quo of deep-sea environment corrosion of metal and alloy materials are reviewed with emphasis on four common types of corrosion such as pitting corrosion, crevice corrosion, tunnel corrosion and stress corrosion. Finally countermeasures for the corrosion control of metals and alloys in deep- sea environment are also introduced.