Abstract: The corrosion status of steel structures and tanks is introduced, and the corrosion environment in coastal areas is analyzed in this paper. In view of the existing disadvantages of the traditional solvent-based coatings outdoors with steel structure served in coastal regions such as harmful elements to health, safety, environmental protection and poor performances of anti-leakage, mechanical abrasion and impact resistance, chemical resistance, as well as poor performances in fouling resistance and self-cleaning properties, unacceptable construction cycle and rigid environmental requirements for construction, a novel coating matching system consisting of solvent-free anti-corrosion primer and nano-inorganic siloxane is studied for purpose. The system has the following advantages in simple construction and better performances in airtight of matching paint, weather resistance, salt spray resistance, mineral dust, erosion resistance, dirt resistance, good self-cleaning. The system is suitable for storage tank, buried pipeline and long-term anti-corrosion coating on steel structure, and has been successfully applied in Zhoushan National Strategic Oil Reserve, which displays a broad application prospect.