Scholarlink

<p>In the present paper, the corrosion behavior of ZG230-450 in chloride-sulfate atmospheric environment was studied, comparing with ordinary low-carbon steel Q235. Long-term and short-term corrosion tests were conducted, the corrosion products of the materials were observed and tested by scanning electron microscope and X-ray diffraction, and the corrosion rate and pitting corrosion behavior of the materials were studied by electrochemical test. The test results show that (1) the corrosion products of Q235 are mainly composed of γ-Fe<sub>2</sub>O<sub>3</sub>, γ-FeOOH, and α-FeOOH, while corrosion products of ZG230-450 are mainly composed of Fe<sub>3</sub>O<sub>4</sub>, γ-FeOOH, and α-FeOOH; (2) in the early stage of corrosion, the corrosion rate of ZG230-450 is higher than that of Q235. When the concentrations of Na<sub>2</sub>SO<sub>4</sub> and NaCl solutions are both 3.5%, the self-corrosion potential value and polarization resistance of ZG230-450 are − 0.706&#xa0;V and 324.75Ω, while the Q235 are − 0.687&#xa0;V and 1080.0Ω, respectively. (3) ZG230-450 has better pitting corrosion resistance than Q235 in the same corrosive environment. When the Na<sub>2</sub>SO<sub>4</sub> and NaCl solution concentrations are both 3.5%, the pitting potentials of ZG230-450 and Q235 are − 0.578&#xa0;V and − 0.558&#xa0;V.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Corrosion characteristics of low-carbon cast steel ZG230-450 in chloride-sulfate atmospheric environment

  • 期刊论文

  • 发表日期：

    2025年7月1日

查看全文
  • Xuan Zheng,
  • Yanping Zhao,
  • Hongxin Yang,
  • Baorong Liu,
  • Chi Zhang

摘要

In the present paper, the corrosion behavior of ZG230-450 in chloride-sulfate atmospheric environment was studied, comparing with ordinary low-carbon steel Q235. Long-term and short-term corrosion tests were conducted, the corrosion products of the materials were observed and tested by scanning electron microscope and X-ray diffraction, and the corrosion rate and pitting corrosion behavior of the materials were studied by electrochemical test. The test results show that (1) the corrosion products of Q235 are mainly composed of γ-Fe2O3, γ-FeOOH, and α-FeOOH, while corrosion products of ZG230-450 are mainly composed of Fe3O4, γ-FeOOH, and α-FeOOH; (2) in the early stage of corrosion, the corrosion rate of ZG230-450 is higher than that of Q235. When the concentrations of Na2SO4 and NaCl solutions are both 3.5%, the self-corrosion potential value and polarization resistance of ZG230-450 are − 0.706 V and 324.75Ω, while the Q235 are − 0.687 V and 1080.0Ω, respectively. (3) ZG230-450 has better pitting corrosion resistance than Q235 in the same corrosive environment. When the Na2SO4 and NaCl solution concentrations are both 3.5%, the pitting potentials of ZG230-450 and Q235 are − 0.578 V and − 0.558 V.