Abstract: In order to control the corrosion occurred in steel materials which are often used in the safety-related DCS cabinets operating in the severe atmospheric corrosion environment, the key technologies of corrosion protection design to meet the life requirement are explored in this paper. Firstly, the design progress of anti-corrosive coating system for cabinet with steel structure as main material is analyzed. The coatings with their characteristics and the coating systems, which are often used under the corrosivity category C4 and high durability, are listed. Besides, the attention of avoiding common problems such as galvanic corrosion, crevice corrosion and stress corrosion during structure design, process and material selection is summarized, aiming at the specific structure prone to corrosion and the position where coating protection cannot be taken according to design requirement. Through the summary of key anti-corrosion design principles such as coating system and design consideration, the reference for the anti-corrosion design of DCS cabinet is provided.

Key words: cabinet; corrosion protection; coating system; design consideration