Hainan Steel teach you: corrosion of the steel structure of a two-step

Hainan Steel teach you: corrosion of the steel structure of a two-step

Steel corrosion resistance and corrosion resistance poor repair, corrosion of steel structure not only caused economic losses, but also to the security structure brings risks, because steel corrosion common cause of incidents. Corrosion of steel construction comprises two steps:
(1) Steel Processing appearance. Steel outer dirt can seriously affect the appearance of the coating on the steel adhesion, and corrosion under the film continues to expand, causing coating failure or damage, therefore, the quality of steel processing quality appearance of the coating protective effect and life about influence, even more than the paint itself breeds influence the performance difference, according to statistics, the appearance of anti-corrosion coating of steel processing account various factors affecting the quality of the coating half
(2) the appearance of brushed steel structure anti-corrosion coatings. Anti-corrosion coating is a colloidal solution of oil or oil-free, it will be applied to the steel exterior, can form a thin film to maintain steel construction, anti-corrosion coating usually consists of a primer and topcoat, primer function is to make the paint film and the grass roots, combined with strong finish, paint the main function is to maintain the lower primer. Steel structure fire performance is poor, its fire resistance of only 15 ~ 20min, according to "building design for fire protection", building components in fire resistance rating of the fire resistance of the secondary when, on support for multi-column to 2.5h, 1.5h beam is , floor to 1.0h, therefore fire prevention measures must be taken to look for steel construction elements, common fire protection: the fire-resistant lightweight panel as a fire cladding; in pouring concrete or masonry member periphery bricks; smear fireproof paint. Usually civil construction and large public buildings should use load-bearing steel structure fire retardant paint fire. Fire retardant coating can be divided into ultra-thin, thin, thick type three, plate, beams usually use ultra-thin and thin fireproof coatings, fireproof coating thick column selection. But at this stage fire retardant paint expensive, so in general steel construction is often chosen in beams look fine aggregate concrete pouring methods, then the appearance of concrete column thickness of 50mm, the outer concrete beam thickness 25mm, and shall be provided in the concrete steel mesh and steel members connected to, which can effectively decrease the cost. Hainan Steel