Anti-corrosion treatment method for steel structure iron tower resistant to ocean climate

Abstract

The invention discloses an anti-corrosion treatment method for a steel structure iron tower resistant to ocean climate. The method comprises the steps that firstly, surface purification treatment and sand blasting rust removal are conducted on the steel structure iron tower; then, the steel structure iron tower is subjected to anti-corrosion treatment in the mode that a zinc-aluminum anti-corrosion coating is sprayed in an electric arc mode within 8h of sand blasting rust removal, and the aluminum content in a zinc-aluminum coating is 8.8%-9.2%; and a distance between a spray gun and the surface of a base body is controlled to be 150 mm-180 mm, a spraying angle is controlled to be 60 degrees-75 degrees, a working current of spraying equipment is 300 A-600 A, a spraying working voltage is 20 V-30 V, and the thickness of the electric arc spraying steel structure coating is 150 microns-200 microns. The method has the advantages that the electric arc spraying zinc-aluminum coating is good in film-forming property and strong in adhesive force, the steel structure iron tower is long in service life in a marine environment and high in acid and alkali resistance and corrosion resistance, existence of coating pinholes can be avoided, coating hardness is high, abrasion and impact resistance are achieved, acid and alkali aging time is long and an anti-corrosion effect on the steel structure iron tower is achieved.

Description

technical field [0001] The invention relates to an anticorrosion treatment method of a steel structure iron tower resistant to marine climate. Background technique [0002] With the continuous development of power grid construction and the wide-scale use of steel structure towers, the corrosion resistance of steel structure towers in coastal areas has become the main problem in the application of steel structure towers. Due to the erosion of seawater, fog, sea breeze, temperature changes, and the influence of sunlight, the paint film will accelerate the loss of gloss, pulverization, and even cracking and falling off. The long-term presence of chloride ions will promote corrosion reactions and accelerate the corrosion rate. Corrosion begins with pitting crevices or corroding concave surfaces, making the damaged passivation film irreparable. Therefore, the corrosion continues to deepen until the metal is destroyed by dendritic cracks. In addition, it has strong penetrability ...

AI Technical Summary

Problems solved by technology

Due to the erosion of seawater, fog, sea breeze, temperature changes, and the influence of sunlight, the paint film will accelerate the loss of gloss, pulverization, and even cracking and falling off. The long-term presence of chloride ions will promote corrosion reactions and accelerate the corrosion rate. Corrosion begins with pitting crevices, or corrosion on concave surfaces, making the damaged passivation film irreparable

Therefore, the corrosion continues to deepen until the metal is destroyed by dendritic cracks. In addition, it has strong penetrability and can easily penetrate the protective film on the metal surface, causing crevice corrosion and pitting corrosion, and shortening the service life of the steel structure tower.