Abstract
Corrosion of steel bar is one of key factors undermining reinforced concrete (RC) structures in a harsh environment. This paper attempts to review the non-destructive procedures from the aspect of the corrosion measurement techniques, especially their advantages and limitations. Systematical classification of diagnostic methods is carried out to determine any probable corrosion issues before the structures become severe, and helps choose the suitable method according to different construction features. Furthermore, the three electrochemical factors method is introduced to inspire researchers to combine various techniques to improve corrosion evaluation accuracy. The recommendations for future work are summarized, in conclusion.
Highlights
Widespread premature deterioration of steel bar embedded in concrete (CSB), due to corrosion, is a major factor causing significant loss
Gravimetric Weight Loss (GWL) is a fundamental destructive method to provide an accurate estimation for corrosion, based on the real measured weight loss before and after corrosion ofbar steel bar (CSB) corrosion
Much effort has been put into comprehensive experimental investigations, in particular to determine the relationships between gravimetrically measured corrosion rate (CR) and various electrochemical parameters, and, in turn, to verify accuracy and effectiveness of some electrochemical testing
Summary
Widespread premature deterioration of steel bar embedded in concrete (CSB), due to corrosion, is a major factor causing significant loss. Destructive testing (GWL) has achieved good results for the appraisement of the preservation status in RC structures; it is least preferred for dynamic corrosion diagnostic and assessment, due to its intrusive approach and induced collateral damage. Corrosion diagnostic technology is an essential tool to identify corrosion damage and validate depending on the comprehensive method of visual inspection with the naked eye and physical the effectiveness anti-corrosion measures. Has achieved good results corrosion and reflecting corrosion process in essence, because of simple-equipment, high-accuracy, appraisement of the preservation status in RC structures; it is least preferred for dynamic and application in field tests. Transferring of electrical charge, electrochemical methods are of great concern, worldwide, for recognition of CSB corrosion and reflecting corrosion process in essence, because of simple-equipment, high-accuracy, and application in field tests. For practical engineering applications, the existing corrosion diagnostic technologies should be studied and compared in the following aspects for the purpose of corrosion
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