激光增材制造Ni-Cr-Mo合金在KCl-K2SO4 混合盐中的高温腐蚀行为研究

doi:10.11902/1005.4537.2025.254

中国腐蚀与防护学报

2026, Vol. 46

Issue (4): 1207-1217 CSTR: 32134.14.1005.4537.2025.254 DOI: 10.11902/1005.4537.2025.254

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激光增材制造Ni-Cr-Mo合金在KCl-K₂SO₄ 混合盐中的高温腐蚀行为研究

孔耀, 黄奕欣, 周木兰, 曾光, 宁华清, 申越, 刘宗德(

)

华北电力大学能源动力与机械工程学院北京 102206

High-temperature Corrosion Behavior of Laser Additive Manufacturing of Ni-Cr-Mo Alloy in KCl-K₂SO₄ Mixed Salt

KONG Yao, HUANG Yixin, ZHOU Mulan, ZENG Guang, NING Huaqing, SHEN Yue, LIU Zongde(

)

College of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China

引用本文:

孔耀, 黄奕欣, 周木兰, 曾光, 宁华清, 申越, 刘宗德. 激光增材制造Ni-Cr-Mo合金在KCl-K₂SO₄ 混合盐中的高温腐蚀行为研究[J]. 中国腐蚀与防护学报, 2026, 46(4): 1207-1217.
Yao KONG, Yixin HUANG, Mulan ZHOU, Guang ZENG, Huaqing NING, Yue SHEN, Zongde LIU. High-temperature Corrosion Behavior of Laser Additive Manufacturing of Ni-Cr-Mo Alloy in KCl-K₂SO₄ Mixed Salt[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(4): 1207-1217.

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摘要:

对激光增材制造Ni-Cr-Mo合金和TP347H不锈钢在600 ℃模拟燃煤锅炉掺烧生物质沉积盐(KCl-K₂SO₄)条件下进行了168 h的腐蚀实验，得到了其腐蚀动力学曲线，结合扫描电子显微镜-能谱仪(SEM-EDS)和X射线衍射仪(XRD)对腐蚀产物的微观形貌、物相组成及成分进行了分析。结果表明：激光增材制造Ni-Cr-Mo合金相较于不锈钢展现出更优异的耐腐蚀性能。腐蚀行为主要表现为氧化腐蚀、活化氧化腐蚀以及碱性熔融机制。随着混合盐中K₂SO₄含量的增加，合金腐蚀程度加剧。Ni-Cr-Mo合金表面形成了致密的保护性氧化层，主要由Cr₂O₃和NiO组成，有效阻碍了腐蚀介质的渗透。然而，活化氧化腐蚀过程使表面氧化层出现孔洞和开裂，促进了腐蚀介质向内扩散，加剧内部硫化反应。

关键词 ：激光增材制造Ni-Cr-Mo合金, 燃煤锅炉掺烧生物质, 高温腐蚀

Abstract：

The corrosion experiment was conducted on the laser additive manufacturing of Ni-Cr-Mo alloy and TP347H stainless steel under simulated conditions of biomass deposition salt (KCl-K₂SO₄) co-firing in a coal-fired boiler at 600 ℃ for 168 h. The corrosion kinetics curves were obtained, and the microstructure, phase composition, and composition of the corrosion products were analyzed using scanning electron microscopy energy dispersive spectroscopy (SEM-EDS) and X-ray diffraction (XRD). The results indicate that laser additive manufacturing of Ni-Cr-Mo alloy exhibits superior corrosion resistance compared to stainless steel. The corrosion behavior mainly manifests as oxidative corrosion, activated oxidative corrosion, and alkaline melting mechanism. With the increase of K₂SO₄ content in the mixed salt, the corrosion degree of the alloy intensifies. The surface of the cladding layer forms a dense protective oxide layer, mainly composed of Cr₂O₃ and NiO, which effectively hinders the penetration of corrosive media. However, the activation oxidation corrosion process causes pores and cracks in the surface oxide layer, promoting the inward diffusion of the corrosive medium and intensifying the internal sulfurization reaction.

Key words： laser additive manufacturing of Ni-Cr-Mo alloy coal-fired boiler mixed with biomass high-temperature corrosion

收稿日期: 2025-08-07 32134.14.1005.4537.2025.254

ZTFLH:

TG178

基金资助:装备预研教育部联合基金青年人才项目(8091B03022303)

通讯作者: 刘宗德，E-mail:lzd@ncepu.edu.cn，研究方向为耐蚀耐磨新材料与微纳米表面技术

Corresponding author: LIU Zongde, E-mail: lzd@ncepu.edu.cn

作者简介: 孔耀，男，1994年生，博士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.254 或 https://www.jcscp.org/CN/Y2026/V46/I4/1207

表1 TP347H不锈钢和Ni-Cr-Mo合金粉末的化学成分 (mass fraction / %)

图1 激光增材制造Ni-Cr-Mo合金、TP347H不锈钢在600 ℃混合盐中腐蚀后的宏观形貌

图2 激光增材制造Ni-Cr-Mo合金、TP347H不锈钢在600 ℃混合盐中腐蚀后的质量损失变化

图3 激光增材制造Ni-Cr-Mo合金、TP347H不锈钢在600 ℃混合盐中腐蚀168 h后表面XRD图

图4 激光增材制造Ni-Cr-Mo合金在600 ℃混合盐中腐蚀168 h后表面形貌

图5 激光增材制造Ni-Cr-Mo合金在600 ℃混合盐腐蚀168 h后表面形貌与元素分布

图6 TP347H不锈钢在600 ℃混合盐中腐蚀168 h后表面形貌

图7 TP347H不锈钢在600 ℃混合盐腐蚀168 h后表面形貌与元素分布

图8 激光增材制造Ni-Cr-Mo合金和TP347H在600 ℃混合盐中腐蚀168 h后截面形貌

图9 激光增材制造Ni-Cr-Mo合金在600 ℃不同比例混合盐腐蚀168 h后表面腐蚀产物XRD图

图10 激光增材制造Ni-Cr-Mo合金在600 ℃不同质量比混合盐腐蚀168 h后表面形貌

图11 激光增材制造Ni-Cr-Mo合金在600 ℃混合盐质量比K2SO4∶KCl = 1∶9腐蚀168 h后的表面形貌与元素分布

图12 激光增材制造Ni-Cr-Mo合金在600 ℃下KCl-K2SO4混合盐中的腐蚀损伤机制

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