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中国腐蚀与防护学报  2024, Vol. 44 Issue (6): 1656-1662     CSTR: 32134.14.1005.4537.2024.009      DOI: 10.11902/1005.4537.2024.009
  研究报告 本期目录 | 过刊浏览 |
SA210C钢在涂覆不同质量比混合盐膜下的高温腐蚀行为
占阜元1, 刘宣义2, 黄世福2, 刘帅岐3, 徐媛媛2, 潘喜桂1, 何华林4, 刘光明3()
1.国能丰城发电有限公司 丰城 331100
2.国家能源集团科学技术研究院有限公司武汉分公司 武汉 430070
3.南昌航空大学材料科学与工程学院 南昌 330063
4.成都诺嘉伟业科技有限公司 成都 611330
Corrosion Behavior of SA210C Steel Beneath Deposit Film of Mixed Salts Na2SO4-NaCl in Air at 600oC
ZHAN Fuyuan1, LIU Xuanyi2, HAUNG Shifu2, LIU Shuaiqi3, XU Yuanyuan2, PAN Xigui1, HE Hualin4, LIU Guangming3()
1. Guoneng Fengcheng Power Generation Co., Ltd., Fengcheng 331100, China
2. Wuhan Branch of National Energy Group Science and Technology Research Institute Co., Ltd., Wuhan 430070, China
3. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
4. Chengdu Great Norga Science and Technology Co., Ltd., Chengdu 611330, China
引用本文:

占阜元, 刘宣义, 黄世福, 刘帅岐, 徐媛媛, 潘喜桂, 何华林, 刘光明. SA210C钢在涂覆不同质量比混合盐膜下的高温腐蚀行为[J]. 中国腐蚀与防护学报, 2024, 44(6): 1656-1662.
Fuyuan ZHAN, Xuanyi LIU, Shifu HAUNG, Shuaiqi LIU, Yuanyuan XU, Xigui PAN, Hualin HE, Guangming LIU. Corrosion Behavior of SA210C Steel Beneath Deposit Film of Mixed Salts Na2SO4-NaCl in Air at 600oC[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(6): 1656-1662.

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摘要: 

为研究表面涂覆质量比分别为Na2SO4∶NaCl = 3∶1、1∶1和1∶3混合盐膜的SA210C钢在600℃下的腐蚀行为,通过实验获得了腐蚀动力学曲线,采用XRD、SEM和EDS分析了腐蚀产物成分、微观结构与形貌。结果表明:涂覆3种不同混合盐膜时,SA210C钢表面主要氧化产物均为Fe3O4和Fe2O3,腐蚀层增重、增厚情况与混合盐膜中NaCl质量占比呈正相关关系。涂覆混合盐膜中NaCl质量比为1∶3时,SA210C钢表面腐蚀产物内部有明显开裂、分层现象,腐蚀产物严重剥落;涂覆NaCl质量比为3∶1时,腐蚀层存在贯穿式裂纹,腐蚀产物膜/基体界面内侧观察到腐蚀现象。

关键词 SA210C钢NaClNa2SO4高温腐蚀火力发电    
Abstract

The corrosion behavior of SA210C steel beneath surface deposit film of mixed salts of Na2SO4∶NaCl = 3∶1, 1∶1 and 1∶3 in air at 600oC was studied by means of corrosion kinetics curve measurement, as well as characterization of composition, microstructure and morphology of the corrosion products by XRD, SEM and EDS. The results show that the corrosion products on the surface of SA210C steel consists mainly of Fe3O4 and Fe2O3, and the mass gain and the thickness of corrosion products scale are positively correlated with the mass proportion of NaCl in the mixed salt film. When the mass ratio of NaCl to Na2SO4 in the mixed salt film is 1∶3, the corrosion products on the surface of SA210C steel have obvious cracking and delamination, and the corrosion products are seriously spalling. When the mass ratio of NaCl to Na2SO4 is 3∶1, penetrating cracks are observed in the corrosion products scale and internal corrosion occurs in the base metal.

Key wordsSA210C steel    NaCl    Na2SO4    high temperature corrosion    thermal power generation
收稿日期: 2024-01-04      32134.14.1005.4537.2024.009
ZTFLH:  TG174  
基金资助:国家自然科学基金(51961028)
通讯作者: 刘光明,E-mail: gemliu@126.com,研究方向为材料的腐蚀与防护
Corresponding author: LIU Guangming, E-mail:gemliu@126.com
作者简介: 占阜元,男,1974年生,工程师
图1  SA210C钢带状金相组织
图2  涂覆不同质量比混合盐膜SA210C钢腐蚀动力学曲线与拟合曲线
Mixed salt filmFitting equationR2
Na2SO4∶NaCl = 3∶1Δm2 = 0.12073t + 0.069570.99799
Na2SO4∶NaCl = 1∶1Δm2 = 0.40358t-0.378250.99771
Na2SO4∶NaCl = 1∶3Δm2 = 0.85023t-0.564060.99223
表1  氧化增重曲线拟合方程相关参数
图3  涂覆不同质量比混合盐膜SA210C钢在600℃腐蚀10 h后XRD图谱
图4  涂覆不同质量比混合盐膜SA210C钢在600℃腐蚀10 h后光学宏观形貌
图5  涂覆不同质量比混合盐膜SA210C钢在600℃腐蚀10 h后表面微观形貌及典型能谱图
图6  涂覆不同质量比混合盐膜SA210C钢在600℃腐蚀10 h后截面微观形貌及能谱图
MaterialYoung's modulus (E / GPa)Poisson's ratio (μ)Coefficient of linear expansion (α / 10-6·K-1)
Fe2O32200.2410.4
Fe3O42100.3213.1
Fe200-15.3
表2  氧化膜内平均热应力方程相关参数
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