Effect of sewage sludge on passivation and chloride-induced depassivation of reinforcing steels in cement extracts

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Construction and Building Materials Pub Date : 2025-02-18 DOI:10.1016/j.conbuildmat.2025.140419

Zijian Song , Tao Ye , Xincheng Li , Yang Zhang , Yantao Zhu , Yingjie Zhang , Yunsheng Zhang

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Abstract

This study systematically investigated the electrochemical and natural passivation abilities, as well as the chloride-induced corrosion behavior of low-carbon (LC) steel and 304 stainless steel (SS) in extracts from cement mixed with DSS, and incinerated sewage sludge ash at 650°C (ISSA650) and 850°C (ISSA850). The amino acids introduced by DSS could form an adsorption film on the steel surface. Although the amino acids impede the electrochemical passivation of both steels, they promote the natural passivation process of LC steel. The adsorption of silica-aluminum phases, significantly increased by ISSA650 and ISSA850 (especially the latter), acts as a physical barrier against chloride penetration, enhancing the pitting resistance of LC steel. In contrast, their influence on the pitting resistance of 304 SS is minimal due to its lower susceptibility to chloride-induced pitting. Based on these findings, the inhibition mechanisms of both steels were proposed, which may provide guidance for the design of highly durable reinforced concrete structures in marine environments.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.