Research on Preparation of Silane Film on the Surface of Carbon Steel and its Property of Corrosion Resistance
A complex silane treatment agent was prepared by cohydrolysis and condensation with 1,2-bis (triethoxysilyl) ethane and vinyltrimethoxysilane as the raw materials.It is coated on the surface of the carbon steel,forming a silane film with a dense structure.Results show that the silane film significantly improves the acid resistance,alkali resistance and salt corrosion resistance of the carbon steel;and more fluorosilicone coating on the film of silane can further improve its corrosion resistance.The corrosion area of the carbon steel sample,which is treated by the silane film/fluorosilicone sealant coating,is only 2.08％ after 360 hours of dry and wet aging.The corrosion current density measured in the aqueous solution of H2SO4,NaOH,NaCl (1 moL/L) is 4.12 × 10-7,4.12 × 10-7,1.05 × 10-9 mA/cm2 respectively.
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