Anticorrosion construction technology and method for steel structure

Abstract

The invention relates to corrosion resistance of the surface of a steel structure, in particular to an anticorrosion construction technology and method for a steel structure. The technology comprises the steps of surface purification treatment, priming paint spraying and finish paint spraying. According to the technology, at first, the surface of the steel structure is mechanically or chemically treated, then a steel metal coating is coated with epoxy zinc rich priming paint to serve as a priming paint coating, and finally acrylic acid polyurethane finish paint is sprayed. An adhesive property of the epoxy zinc rich priming paint and a base body is good, the cracking phenomenon of a base layer is avoided, the face layer has better wear resistance and corrosion resistance, the binding force of the anticorrosion layer and the steel structure base body is high and reaches 15.0-20 Mpa on average, surface hardness reaches over HV410 and is much higher than the national standard, the long-acting anticorrosion purpose can be achieved, and the appearance of the structure is improved. Moreover, construction quality of the anticorrosion coating is ensured, the work progress is improved, and the maintenance cost of the steel structure is saved.

Description

technical field [0001] The invention relates to steel structure anticorrosion technology, in particular to a steel structure anticorrosion construction process and method. Background technique [0002] In the northern coastal areas, the climate is generally cold and humid. It is an oceanic climate, prone to fogging and high humidity. Therefore, the northern coastal areas are the most severely corroded areas for steel structure facilities. The main reason is that the steel surface is periodically affected by seawater. Wet, in an alternating state of dry and wet, with sufficient oxygen supply and continuous concentration of salt; in addition, the synergistic effects of sunlight, wind and seawater environment lead to the most serious corrosion, which brings great challenges to the anticorrosion work of steel structures. The severe corrosion of the marine environment will inevitably directly threaten the safety of these steel facilities and will cause major economic losses; at p...

AI Technical Summary

Problems solved by technology

[0002] In the northern coastal areas, the climate is generally cold and humid. It is an oceanic climate, prone to fogging and high humidity. Therefore, the northern coastal areas are the most severely corroded areas for steel structure facilities. The main reason is that the steel surface is periodically affected by seawater. Wet, in an alternating state of dry and wet, with sufficient oxygen supply and continuous concentration of salt; coupled with the synergistic effects of sunlight, wind and seawater environment, the most serious corrosion occurs, which brings great challenges to the anticorrosion work of steel structures

The severe corrosion of the marine environment will inevitably directly threaten the safety of these steel facilities and will cause major economic losses; at present, most of the anticorrosion components of steel structures are mainly water-based paints, but in winter in the north, almost all temperatures in the north are below zero , the water-based paint freezes and cannot be applied at all. In the south, where the temperature is too low and the humidity is too high, the ordinary water-based paint cannot dry for a long time, which seriously affects the production efficiency and production delivery time, and it is very easy to appear. Drooping, shrinkage, pinholes, etc., and how to make the water-based film thickness reach more than 150 microns (dry film thickness) at one time is a problem that water-based paints still need to overcome.