Research On Chloride Ion Permeability And Corrosion & Protection Of Steel In Reinforced Concrete

Since the middle last century, more and more concrete buildings had occurredearly failure and collapsing accident because of their poor durability at home andabroad. Each nation puts in heavy costs to deal with above conditions. The concretestructure durability problem is increasingly predominant because of engineering safeand vast expenditure economic factors,. It is emphasized broadly by the academicrealm and engineering field gradually. Therefore, in order to effectively do withcorrosion problems of reinforced concrete, it is necessary to discuss corrosionphenomena and the basic factors. In the building structure design stage or earlycorrosion it has to prevent and cut down losses. In terms of capital, resources andenergy conservation, improving concrete durability have major significance.This research designs the corrosion research programs which include laboratoryexperiment and marine environment with electrochemical method and the method ofweight loss. Reinforcement corrosion of reinforced concrete in the water environmentand laboratory conditions is researched by linear polarization method, linear scan of±10mv in the open circuit potential and get polarization resistance Rp of reinforcedsteel, on the other hand the weight of concrete reinforced in the natural environment ismeasured and get the corrosion rate.The article studies about the principle of chloride permeability in reinforcedconcrete by soak in saline. According to the test results, we get initial depth and thediffusion coefficient.At the same time, the samples are soaked in Qingdao and insolated in Wuhanatmospheric environment. Carry on the fast chlorine ion permeates to experiment,and evaluate durability of kinds of concrete by studying on the Relativity betweenaccumulating electricity quantity and coefficient of diffusion of the chloride ion.In the end, the article studies effect of corrosion on cohesive force of steel barthat has two kinds of different protective layers. This thesis designs two kinds ofreinforcing bar which is processed with epoxy layer and heat plate zinc.The experimental results some conclusions and accumulates corrosionenvironmental data about corrosion and protection of reinforced concrete, and studyon corrosion of concrete and reinforced concrete and their protective & damagedprocess, comparison and analysis of the samples which are with treatment and withouttreatment, which offers necessary and reliable data to our countries infrastructures andgreat engineering of choosing materials reasonably. This study will developevaluation technology of atmosphere corrosion actions on reinforced concretematerials and protective systems which offers scientific theories and assessmentmethods on selecting materials for improving reliability, security of architecture.