不同植酸盐对<strong>Q235</strong>钢腐蚀行为的影响

doi:10.11902/1005.4537.2023.232

中国腐蚀与防护学报

2024, Vol. 44

Issue (3): 669-678 CSTR: 32134.14.1005.4537.2023.232 DOI: 10.11902/1005.4537.2023.232

研究报告

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不同植酸盐对Q235钢腐蚀行为的影响

周龙¹, 鲁骏¹, 丁文珊¹, 李昊¹, 陶涛¹, 师超¹(

), 邵亚薇², 刘光明¹

1.南昌航空大学江西省金属材料微结构调控重点实验室南昌 330063
2.哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001

Effect of Different Phytates on Corrosion Behaviors of Carbon Steel

ZHOU Long¹, LU Jun¹, DING Wenshan¹, LI Hao¹, TAO Tao¹, SHI Chao¹(

), SHAO Yawei², LIU Guangming¹

1. Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang 330063, China
2. School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China

引用本文:

周龙, 鲁骏, 丁文珊, 李昊, 陶涛, 师超, 邵亚薇, 刘光明. 不同植酸盐对Q235钢腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2024, 44(3): 669-678.
Long ZHOU, Jun LU, Wenshan DING, Hao LI, Tao TAO, Chao SHI, Yawei SHAO, Guangming LIU. Effect of Different Phytates on Corrosion Behaviors of Carbon Steel[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(3): 669-678.

全文: PDF(15477 KB) HTML

摘要:

利用硫酸盐和植酸钠反应制备植酸盐，并通过扫描电镜(SEM)、能谱仪(EDS)、红外光谱(FT-IR)、X射线衍射(XRD)对植酸盐进行表征，所制备的植酸盐样品存在明显磷酸基团，为非晶态，表现为球状颗粒，直径在300~400 nm。通过滴定实验分析植酸盐在水溶液中的溶解度，通过Tafel极化法、电化学阻抗法、腐蚀浸泡实验研究Q235钢在植酸盐3.5%NaCl浸出液中的腐蚀行为。结果表明，植酸铝浸出液中生成铝酸(Al(OH)₃)导致Q235钢腐蚀速率加快，植酸镁、植酸钙、植酸锰及植酸锌浸出液中Q235钢腐蚀速率减缓。其中，植酸锌的缓蚀效率能达到92.46%，表现出良好的缓蚀性能。

关键词 ： Q235钢, 腐蚀, 植酸盐, 缓蚀性能

Abstract：

The study on the preparation and properties of new anti-rust pigments is of significance for the development of anticorrosion coatings. In this paper, phytates were prepared by reaction of sulfates with sodium phytate. The phytates were characterized using SEM, EDS, FT-IR, and XRD analysis. The results showed that the prepared phytates were amorphous containing obvious phosphate groups, and presented as spherical particles with a diameter of 300-400 nm. The solubilities of phytates in aqueous solution were analyzed through titration test. The corrosion behavior of Q235 steel in phytate-extracting solutions, which were acquired by soaking aluminum-, magnesium-, calcium-, manganese- and zinc-phytates, respectively, in 3.5%NaCl solution and then leaching, were studied via immersion test, Tafel polarization, and electrochemical impedance spectroscopy. The findings revealed that the corrosion rate of carbon steel increased in aluminum phytate-extracting solution due to the production of aluminum-acid (Al(OH)₃). However, the corrosion rates decreased in the other four extracting solutions. Notably, the inhibition rate of zinc phytate was approximately 92.46%.

Key words： Q235 steel corrosion phytate inhibition

收稿日期: 2023-07-27 32134.14.1005.4537.2023.232

ZTFLH:

TG178

基金资助:国家自然科学基金(52001155);江西省自然科学基金(20212BAB214038);博士启动基金(EA201901056)

通讯作者: 师超，E-mail：shichao@nchu.edu.cn，研究方向为金属材料的腐蚀与防护

Corresponding author: SHI Chao, E-mail: shichao@nchu.edu.cn

作者简介: 周龙，男，2001年生，本科生

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图1 不同植酸盐的微观形貌及EDS分析结果

表1 不同植酸盐的原子分数

图2 不同植酸盐的FT-IR谱

图3 不同植酸盐的XRD谱

表2 滴定数据

图4 不同植酸盐浸出液中Q235钢电极开路电位变化

图5 Q235钢电极在不同植酸盐浸出液中的电化学阻抗图

图6 等效电路图

表3 EIS测试结果的拟合参数

图7 不同植酸盐浸出液中Q235钢电极的Tafel曲线

表 4 不同植酸盐浸出液中Q235钢电极Tafel拟合参数

图8 Q235钢在磷酸锌、植酸锌、植酸钙、植酸锰、植酸铝浸出液中浸泡不同时间后的表面形貌

图9 Q235钢在不同植酸盐浸出液中浸泡48 h后表面形貌及EDS分析结果

表5 Q235钢在磷酸锌、植酸锌、植酸钙、植酸锰、植酸铝浸出液中浸泡48 h后表面成分分析结果

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