Anticorrosion epoxy powder paint used outside marine steel pipe pile

Abstract

The invention provides an anticorrosion epoxy powder paint used outside a marine steel pipe pile, which is characterized in that, the formula of the anticorrosion epoxy powder paint comprises the following components in percentage by weight: 40-60 percent of phenol-modified epoxy resin, 0-20 percent of bisphenol A epoxy resin, 0-20 percent of linear phenol curing agent, 5-25 percent of phenol curing agent, 0.3-1.5 percent of 2-phenylimidazole, 0.2-1 percent of silane coupling agent, 0.2-3 percent of gas phase white carbon, 0-2 percent of hydroxy-phenyl benzotriazole ultraviolet absorbent and hindered amine light stabilizer, 0-5 percent of modified polyfluortetraethylene wax, 5-25 percent of glass powder, 5-30 percent of talcum powder, silicon powder and mica powder, 5-10 percent of aluminium triphosphate, iron red, rutile titanium pigment and cuprous oxide and 0-3 percent of pigment. The paint provided by the inventon has the advantages that the surface roughness of a coating satisfies the required built-in strength of a steel pile and the marine geological condition of the steel pile, and the paint has the characteristics of excellent scratch resistance, shock resistance, abrasion resistance, marine biological fouling resistance, ageing resistance, ultraviolet irradiation resistance and the like.

Description

technical field [0001] The present invention relates to the anti-corrosion technology of marine engineering steel structure, specifically, generally refers to the long-term anti-corrosion technology of the outer wall of steel pipe piles and steel sheet piles. Background technique [0002] Steel piles, including steel pipe piles and steel sheet piles, are metal structure support materials widely used in marine foundation projects such as piers, bridges, offshore platforms, and wind power stations. Due to the harsh corrosion environment of the ocean, steel piles made of ordinary steel The annual corrosion rate reaches 1-2 mm / year, and the rate of pitting corrosion due to defects caused by the manufacturing and installation process and the local corrosion caused by the residence of marine organisms is several times greater than that of uniform corrosion. The earliest service life of 20 to 30 years has been increased to the durability requirement of more than 100 years. It is ur...

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Problems solved by technology

However, most of the above anti-corrosion coatings have poor self-protection performance, and they only have a life span of 5 to 20 years in the marine environment. In the tidal zone and splash zone, the coating fails faster due to long-term erosion and impact factors. Due to the overprotection effect of cathodic protection in the full immersion area or submud area, the coating is easy to peel off under the damage of hydrogen evolution and alkaline degradation, and marine organisms are easy to adhere to cause fouling and other effects, and the anti-corrosion life of the coating is not ideal requirements

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