Welded, sandblasted, stainless steel corrugated bars in non-carbonated and carbonated mortars: A 9-year corrosion study

被引：50
作者：
Bautista, A. [1 ]
Paredes, E. C. [1 ]
Alvarez, S. M. [1 ]
Velasco, F. [1 ]
机构：
[1] Univ Carlos III Madrid, Mat Sci & Engn Dept, Madrid 28911, Spain
来源：
CORROSION SCIENCE | 2016年 / 102卷
关键词：
Stainless steel; Steel reinforced concrete; EIS; Polarization; Welding; ELECTROCHEMICAL-BEHAVIOR; CONCRETE INTERFACE; ALKALINE-SOLUTIONS; PITTING CORROSION; REINFORCING STEEL; DIFFERENT PH; REINFORCEMENTS; POLARIZATION; PASSIVATION; OXIDES;
D O I：
10.1016/j.corsci.2015.10.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Three different stainless steel corrugated grades (UNS S20430, S30403 and S32205) were similar welded to stainless steel bars with the same composition and dissimilar welded to carbon steel (CS). After cleaning the welding oxides by sandblasting, the reinforcements were embedded in mortar with chlorides and some of the samples were carbonated. Corrosion activity was monitored using corrosion potential (Emu) and electrochemical impedance spectroscopy (EIS). After 8 years of exposure, the samples were anodically polarized. Visual evaluation of the attack was performed after another additional year of exposure. Similar welded stainless steels offer a good durability if they have been sandblasted, except for S20430 when it is embedded in carbonated mortar with chlorides. Dissimilar welded steels are active since the beginning of the exposure for both studied conditions, but sandblasting reduces the corrosion rate of CS compared to non-welded CS bars. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：363 / 372
页数：10
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