Effect of heat flux on metal corrosion in non-boiling media: testing system, heat transfer simulations, and corrosion study on Al alloy

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2022-09-23 DOI:10.1080/1478422X.2022.2126084

C. Wen, Qianwen Zhang, K. Qi, Zhenyu Chen, Y. Qiu, X. Guo

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引用次数: 2

Abstract

ABSTRACT A dual-circulation testing system was constructed to study the effect of heat flux density (q, −22.28 ∼ +22.54 kW m-2) on the corrosion of an Al–Cu–Mg–Mn alloy in 0.5 M H2SO4 at a constant metal surface temperature (50°C) under different controlling heat transfer states. Their heat transfer parameters were determined quantitatively by COMSOL simulation to keep them except q in constant, highlighting the influence of q on metal corrosion. Compared with the q = 0 condition, the positive heat flux (q > 0) improved the surface layer performance of the Al alloy to inhibit its anodic corrosion process, decreasing its corrosion current density (i corr) by 56% with increasing q to 22.54 kW m-2. While q < 0, the opposite effect occurred, increasing its i corr by 52% at q = −22.28 kW m-2. Heat flux also changed the corrosion reaction’s apparent effective activation energy (E a) and pre-factor, and E a played a dominating role in changing i corr.

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热流密度对非沸腾介质中金属腐蚀的影响:测试系统、传热模拟和铝合金腐蚀研究

建立了双循环测试系统，研究了在金属表面温度恒定(50℃)条件下，不同控制传热状态下，热流密度(q，−22.28 ~ +22.54 kW M -2)对Al-Cu-Mg-Mn合金在0.5 M H2SO4中腐蚀的影响。通过COMSOL模拟定量确定了除q外的其他传热参数，突出了q对金属腐蚀的影响。与q = 0条件相比，正热流密度(q > 0)改善了铝合金的表面层性能，抑制了铝合金的阳极腐蚀过程，当q增加到22.54 kW m-2时，腐蚀电流密度(i corr)降低了56%。当q < 0时，则相反，在q = - 22.28 kW m-2时，其i系数提高了52%。热流通量也改变了腐蚀反应的表观有效活化能(ea)和预因子，其中ea对其变化起主导作用。

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来源期刊

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.