垃圾焚烧炉热管用12Cr1MoVG钢在不同碱金属混合熔盐中的热腐蚀行为

张炜; 何建军

doi:10.11973/jxgccl201902003

垃圾焚烧炉热管用12Cr1MoVG钢在不同碱金属混合熔盐中的热腐蚀行为

张炜¹,
何建军²

1. 广州特种承压设备检测研究院, 广州 510663;
2. 长沙理工大学能源与动力工程学院, 长沙 410114

基金项目:

广东省质监局科技项目（2016CT20）

详细信息

作者简介:
张炜(1987-),男,湖南郴州人,工程师,硕士

中图分类号: TG178
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出版历程
- 收稿日期: 2018-01-17
- 修回日期: 2019-01-08
- 刊出日期: 2019-02-19

Thermal Corrosion Behavior in Mixed Molten Salt of Different Alkali Metals of 12Cr1MoVG Steel for Heat Pipe in Waste Incinerator

ZHANG Wei¹,
HE Jianjun²

1. Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663, China;
2. School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China

摘要

摘要: 采用腐蚀动力学方法，结合腐蚀表面形貌观察和微区成分分析，研究了垃圾焚烧炉热管用12Cr1MoVG钢在KCl+NaCl、KCl+K₂SO₄、NaCl+Na₂SO₄和K₂SO₄+Na₂SO₄（物质的量比均为1∶1）等混合熔盐中的热腐蚀行为。结果表明：试验钢在KCl+NaCl熔盐中的腐蚀质量变化和腐蚀深度大于在K₂SO₄+Na₂SO₄熔盐中的，腐蚀层中产生了大小不一的孔洞且氯元素已渗入基体，碱金属氯盐对试验钢的腐蚀作用大于碱金属硫酸盐的；试验钢在KCl+K₂SO₄熔盐中的腐蚀质量变化和腐蚀深度大于在NaCl+Na₂SO₄熔盐中的，腐蚀层较为疏松，钾盐对试验钢的腐蚀能力强于钠盐的；试验钢的腐蚀速率由大到小按熔盐排序为KCl+NaCl、K₂SO₄+Na₂SO₄、KCl+K₂SO₄、NaCl+Na₂SO₄。
- 12Cr1MoVG钢 /
- 熔盐腐蚀 /
- 碱金属 /
- 氯盐 /
- 硫酸盐
Abstract: Thermal corrosion behavior of 12Cr1MoVG steel for heat pipe in waste incinerator in mixed molten salts were studied by corrosion kinetic method, corrosion surface observation and micro area composition analysis; the mixed molten salts were KCl+NaCl, KCl+K₂SO₄, NaCl+Na₂SO₄ and K₂SO₄+Na₂SO₄, respectively, whose molar ratios were all 1:1. The results show that the corrosion mass change and corrosion depth of the tested steel in molten salt of KCl+NaCl were higher than those in molten salt of K₂SO₄+Na₂SO₄, holes of different size were produced in the corrosion layer and chlorine already penetrated into the substrate. The corrosion effect of alkali metal chloride salt on the tested steel was greater than that of alkali metal sulfate salt. The corrosion mass change and corrosion depth of the tested steel in KCl+K₂SO₄ molten salt were greater than those in NaCl+Na₂SO₄ molten salt and the corrosion layer was looser. The corrosion ability of the potassium salt to the tested steel was stronger than that of the sodium salt. The corrosion rate of the tested steel from large to small was listed as follows:KCl+NaCl, K₂SO₄+Na₂SO₄, KCl+K₂SO₄, NaCl+NaSO₄.
- 12Cr1MoVG steel /
- molten salt corrosion /
- alkali metal /
- chloride salt /
- sulfate salt

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参考文献(24)

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垃圾焚烧炉热管用12Cr1MoVG钢在不同碱金属混合熔盐中的热腐蚀行为

作者简介: 张炜(1987-),男,湖南郴州人,工程师,硕士

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出版历程

Thermal Corrosion Behavior in Mixed Molten Salt of Different Alkali Metals of 12Cr1MoVG Steel for Heat Pipe in Waste Incinerator

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作者简介:
张炜(1987-),男,湖南郴州人,工程师,硕士