Role of Manganese Sulfide Inclusions in Steel Rebar in the Formation and Breakdown of Passive Films in Concrete Pore Solutions

被引：28

作者：

Al-Negheimish, Abdulaziz ^{[1
]}

Alhozaimy, Abdulrahman ^{[1
]}

Hussain, Raja Rizwan ^{[1
]}

Al-Zaid, Rajeh ^{[1
]}

Singh, J. K. ^{[2
]}

Singh, D. D. N. ^{[2
]}

机构：

[1] King Saud Univ, Dept Civil Engn, Ctr Excellence Concrete Res & Testing, Riyadh, Saudi Arabia

[2] Natl Met Lab, CSIR, Corros & Surface Engn Div, Jamshedpur 831007, Bihar, India

来源：

CORROSION | 2014年 / 70卷 / 01期

关键词：

concrete; electrochemical impedance spectroscopy; passivity; Raman spectroscopy; steel-reinforced concrete; x-ray photoelectron spectroscopy; PITTING CORROSION; CARBON-STEEL; CHLORIDE; INITIATION; AES; XPS;

D O I：

10.5006/0941

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study examined manganese sulfide (MnS) inclusions in steel rebar exposed to a simulated concrete pore solution to understand their role in passive film, corrosion, and pit propagation behavior. The passive film was characterized using x-ray photoelectron spectroscopy, Raman spectroscopy, scanning electron microscopy, and electrochemical techniques. The results showed that MnS inclusions adversely affected the nature of the passive film and accelerated corrosion and pit formation. A schematic model was developed to explain the deterioration of passive film formed on steel containing MnS inclusions, and was validated by Raman spectroscopy of the resulting rust formed on such steel.

引用

页码：74 / 86

页数：13

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