Long-term stability and electronic properties of passive film of lean-duplex stainless steel reinforcements in chloride containing mortar

被引：29

作者：

Martin, U. ^{[1
]}

Bosch, J. ^{[1
]}

Ress, J. ^{[1
]}

Bastidas, D. M. ^{[1
]}

机构：

[1] Univ Akron, Natl Ctr Educ & Res Corros & Mat Performance, NCERCAMP UA, Dept Chem Biomol & Corros Engn, 302 E Buchtel Ave, Akron, OH 44325 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 291卷

关键词：

Reinforced mortar; Low-nickel duplex stainless steel; Passive film; Electrochemical impedance spectroscopy; Mott-Schottky; XPS; STRESS-CORROSION CRACKING; ELECTROCHEMICAL-BEHAVIOR; SIMULATED CONCRETE; SURFACE-CHEMISTRY; CAPACITANCE; RESISTANCE; REBARS; MEDIA; MODEL; EIS;

D O I：

10.1016/j.conbuildmat.2021.123319

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The corrosion behavior, semiconducting properties and chemical composition of the passive film formed on lean-duplex stainless steel LDSS 2001, LDSS 2304 and AISI 304 reinforcements embedded in OPC mortar containing chloride, 0, 0.4, 2 and 4 wt% Cl; after 2.5 years were studied. The C-eff,C-film of LDSS 2001 remained constant at 3 x 10(-5) F/cm(2) for all Cl concentrations. Flat-band potential, E-FB,E-A, of LDSS 2001 increased with the Cl concentration, suggesting a Cr2O3 film more prone to accept electrons, reducing the vacancy density. The enrichment in chromium in the passive film of LDSS 2001 after 2.5 years increases from 44% to 61%. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：16

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