The Research On Steel Structure Surface Protective Coating Of Thermal Spraying Zinc

The application of steel structure in our country national economy each domain,but the surface of the steel structure corrosion phenomenon is very common, this hasbecome the field of materials science and engineering of the project can not beignored. The data shows, the whole world every90s has1t steel to rust, our countryeach year due to corrosion loss exceeds1ten million ton steel. So the study of steelstructure corrosion mechanism, influencing factors and protective methods is verynecessary. Domestic and foreign relevant departments and experts estimate, if willnow corrosion and corrosion prevention of scientific knowledge to popularize, canmake the corrosion loss is reduced by at least30%. The corrosion science and a largenumber of practical application in various fields, for the modernization of our countrydevelopment is of far-reaching significance, can save the country a lot of energy,conservation of resources, reduce pollution, reduce the hazard, is to improve thesocial benefit, economic benefit and environmental benefit effective way.Because steel structure using environmental condition each are not identical, itscorrosion have different influence factors, so we must develop the correspondingprotection method. This project researches on steel surface thermal spraying zinccoating technology, and the design and preparation of two kinds of thermal sprayingzinc coating. In the scanning electron microscope (SEM) were observed under twokinds of zinc coating surface and cross-sectional morphology, with the Genesis60spectrometer (EDS) coating was observed the microstructure, analyzes thecomposition and physical properties.Study of two kinds of coating corrosion resistance and on steel protection ability,the study was carried out in water immersion test, test cycle for1years. Regularlyduring the experiment samples were observed, and the corrosion rate by weight lossmethod, at the same time using a variety of materials characterization technique tostudy the corrosion products and corrosion morphology. According to the thermalspraying zinc coating in corrosion environment test of continuous long time corrosionweight loss, calculation of the zinc coating corrosion rate prediction of depth, the zinccoating corrosion protection life.This study fills in Changsha water corrosion of thermal spraying zinc coating onthe corrosion behavior of base data gaps. The design and preparation of high performance thermal spraying zinc coating on steel structure and its protection onapplication provides certain theory basis.