Inhibition effect of tannic acid and sodium molybdate for the flow corrosion of 304 stainless steel on 90° elbow

Siyao Chen; Shao chun Wang; Yong Suo; Guangming Yang; Yafei Du; Yongsheng Ren

Journal of Materials Research and Technology (Sep 2022)

Inhibition effect of tannic acid and sodium molybdate for the flow corrosion of 304 stainless steel on 90° elbow

Siyao Chen,
Shao chun Wang,
Yong Suo,
Guangming Yang,
Yafei Du,
Yongsheng Ren

Affiliations

Siyao Chen: State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
Shao chun Wang: State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
Yong Suo: State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
Guangming Yang: State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
Yafei Du: State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
Yongsheng Ren: Corresponding author.; State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China

Journal volume & issue: Vol. 20
pp. 2408 – 2420

Abstract

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In this paper, the optimal ratio of tannic acid (TA) and sodium molybdate (SM) and the influence of different hydrodynamic factors on the corrosion inhibition effect of 304 stainless steel at 90° bending were evaluated. This study combines static immersion and simulation of a pipeline circulating flow device, and uses electrochemical and computational fluid dynamics (CFD) simulations to evaluate the corrosion inhibition effect of corrosion inhibitors in this system. The optimal ratio of tannic acid and sodium molybdate is 3 g/L tannic acid +0.05 g/L sodium molybdate. The study found that the corrosion inhibition efficiency of the corrosion inhibitor at different positions of the elbow is different, and the corrosion inhibition efficiency decreases with the increase of the flow rate. The surface morphology and corrosion products of the samples were analyzed by SEM and XPS, which further verified the experimental results and analyzed the corrosion inhibition mechanism.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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