Study of corrosion rate in reinforced-concrete

U radu su prikazani rezultati eksperimentalnog istraživanja brzine korozije na dvjema grupama armiranobetonskih uzoraka. Ubrzana korozija armature potaknuta je naizmjeničnim ciklusima vlaženja i sušenja u slanoj komori. Mjerena su tri parametra korozije: elektrokemijski potencijal, električni otpor betona i gustoća korozijske struje. Analizirani su rezultati mjerenja te su kao rezultat dane preporuke za ocjenu stanja armature pri istražnim radovima na postojećim konstrukcijama.Results obtained by the study of corrosion rate, conducted on two groups of reinforced-concrete samples, are presented in the paper. The accelerated corrosion of steel was incited by alternating wetting and drying cycles in salt chamber. Three corrosion parameters were measured: electrochemical potential, electrical resistance of concrete, and corrosion current density. The measurement results were analysed and, on that basis, recommendations are given for assessing condition of reinforcing steel in the scope of analysis of existing structures