Purpose

This study aims to describe the effect of magnetic field (MF) on the corrosion rate of N-80 carbon steel [N-80 carbon steel (CS)] in concentrated (12.5 Wt.%, 3.8 M) hydrochloric acid (HCl) using gravimetric weight loss (WL) measurements and potentiodynamic polarization (PDP) in various conditions at ambient temperature.

Design/methodology/approach

The effects of MF intensity, magnetization time and elapsed time on corrosion rate (CR) reduction (η) were studied.

Findings

The experimental results show that pre-magnetization of HCl sharply decreases the corrosion rate of N-80 carbon steel (CS) in acid. The maximum η was found to be 94%. The surface of CS was analyzed with scanning electron microscope in normal and magnetized acid.

Originality/value

To the best of the authors’ knowledge, no studies have delved into the effects of magnetization on the corrosion rate of CS in concentrated HCl solutions. All of the previous research studies deal with an external MF that is applied on the reaction cell, but the magnetization of fluid before coming in contact with CS is investigated for the first time. In the present work, the influence of MF on the corrosion rate of CS in HCl is illustrated using gravimetric WL and PDP methods. The effects of MF intensity as well as period of magnetization and elapsed time were verified in more than 35 tests.

中文翻译：

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从机理上理解磁场对 HCl 水溶液中 N-80 碳钢腐蚀的影响

目的

本研究旨在描述磁场 (MF) 对 N-80 碳钢 [N-80 碳钢 (CS)] 在浓 (12.5 Wt.%, 3.8 M) 盐酸 (HCl) 中的腐蚀速率的影响。环境温度下各种条件下的重力失重 (WL) 测量和动电位极化 (PDP)。

设计/方法/方法

研究了 MF 强度、磁化时间和经过时间对腐蚀速率 (CR) 减少 ( η ) 的影响。

发现

实验结果表明，HCl 的预磁化显着降低了 N-80 碳钢 (CS) 在酸中的腐蚀速率。发现最大η为 94%。在普通酸和磁化酸中用扫描电子显微镜分析 CS 的表面。

原创性/价值

据作者所知，还没有研究深入研究磁化强度对浓 HCl 溶液中 CS 腐蚀速率的影响。之前的所有研究都涉及应用于反应池的外部 MF，但首次研究了流体在与 CS 接触之前的磁化。在目前的工作中，MF 对 HCl 中 CS 腐蚀速率的影响使用重量法 WL 和 PDP 方法说明。在超过 35 次测试中验证了 MF 强度以及磁化周期和经过时间的影响。