Effects of Yttrium on Corrosion Behavior of 09CrCuSb Alloy in High Concentration Sulfuric Acid

doi:10.7652/xjtuxb201303013

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Effects of Yttrium on Corrosion Behavior of 09CrCuSb Alloy in High Concentration Sulfuric Acid

更新时间：2025-07-09

- Effects of Yttrium on Corrosion Behavior of 09CrCuSb Alloy in High Concentration Sulfuric Acid
- Vol. 47, Issue 3, Pages: 69-74(2013)
- 作者机构：
  
  西安交通大学金属材料强度国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201303013
  CLC： TB37
- Online First：10 March 2013，
  
  Published：2013
- 稿件说明：
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Effects of Yttrium on Corrosion Behavior of 09CrCuSb Alloy in High Concentration Sulfuric Acid[J]. 2013, 47(3): 69-74.
DOI：

Effects of Yttrium on Corrosion Behavior of 09CrCuSb Alloy in High Concentration Sulfuric Acid[J]. 2013, 47(3): 69-74. DOI： 10.7652/xjtuxb201303013.

摘要

利用扫描电子显微镜、X射线衍射仪和电化学测试系统

研究了添加稀土元素钇对09CrCuSb合金(称为ND钢)耐硫酸露点腐蚀能力的影响

结果表明:在110 ℃、质量分数为85%的硫酸溶液中腐蚀72 h后

加钇合金的单位面积腐蚀质量损失低于未加钇合金在相同条件下的腐蚀质量损失

表明添加钇元素可提高合金的耐腐蚀能力。对腐蚀产物进行分析后发现

加钇合金的表层腐蚀产物结构细小、均匀、致密。此外

在合金中添加钇提高了腐蚀产物/合金基体的界面结合强度。电化学测试结果显示

添加钇有利于减小合金的自腐蚀电流

提高极化电阻

从而增加电化学反应的阻力

促使合金腐蚀更快进入钝化区并且保持更小的维钝电流密度。

Abstract

SEM and XRD analyses and electrochemistry tests were conducted to investigate the effect of rare earth yttrium on the corrosion behavior of 09CrCuSb alloy. The mass loss of the sample with yttrium addition in 85% sulfuric acid solution at 110 ℃ after 72 hours was much lower than that of the sample without yttrium addition at the same condition. The results indicate that yttrium improves the corrosion resistance of 09CrCuSb alloy effectively. Investigating the structure of the corrosion scale

it is found that yttrium addition facilitates formation of a fine

uniform and compact corrosion layer. Moreover

yttrium addition strengthens the contact between corrosion layer and matrix to improve the scale adherence intensity. As a result

the self-corrosion current is reduced

and the polarization resistance is heightened to enhance the resistance against electrochemical reaction

thus the alloy rapidly tends to passivation with lower passive current density.

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references

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