植酸锌的制备及其对<strong>Q235</strong>钢腐蚀行为的影响

doi:10.11902/1005.4537.2023.159

中国腐蚀与防护学报

2024, Vol. 44

Issue (2): 396-404 CSTR: 32134.14.1005.4537.2023.159 DOI: 10.11902/1005.4537.2023.159

研究报告

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植酸锌的制备及其对Q235钢腐蚀行为的影响

周兰欣¹, 张丽萍¹, 汤燕¹, 陈柯宇¹, 周剑军¹, 师超¹^,²(

), 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

Preparation of Zinc Phytate and Its Effect on Corrosion Behavior of Carbon Steel

ZHOU Lanxin¹, ZHANG Liping¹, TANG Yan¹, CHEN Keyu¹, ZHOU Jianjun¹, SHI Chao¹^,²(

), SHAO Yawei², LIU Guangming¹

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

引用本文:

周兰欣, 张丽萍, 汤燕, 陈柯宇, 周剑军, 师超, 邵亚薇, 刘光明. 植酸锌的制备及其对Q235钢腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2024, 44(2): 396-404.
Lanxin ZHOU, Liping ZHANG, Yan TANG, Keyu CHEN, Jianjun ZHOU, Chao SHI, Yawei SHAO, Guangming LIU. Preparation of Zinc Phytate and Its Effect on Corrosion Behavior of Carbon Steel[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(2): 396-404.

全文: PDF(15703 KB) HTML

摘要:

采用磷酸、植酸、氯化锌制备磷酸锌和植酸锌，通过扫描电子显微镜(SEM)、能谱分析(EDS)、红外光谱(FT-IR)和热重(TG)等手段对制备的磷酸锌和植酸锌进行表征，通过滴定实验分析磷酸锌和植酸锌在水溶液中的溶解度。根据Tafel极化法、电化学阻抗法和腐蚀浸泡实验分析了磷酸锌和植酸锌浸出液中Q235钢的腐蚀特性。结果表明：制备的磷酸锌为非均匀大小的微米片状结构，厚度在0.5~1 μm之间，植酸锌为团聚状粉末状颗粒，粒径在2~5 μm之间；植酸锌在浸出2 h以后，溶液中植酸根含量达到饱和，对Q235钢的缓蚀效率约在90%，表现出良好的缓蚀性能。

关键词 ： Q235钢, 腐蚀, 植酸锌, 缓蚀性能

Abstract：

The performance-based study on anticorrosive pigment is of significance to the development of new pigment for anticorrosive coatings. Zinc phosphate and zinc phytate were prepared from phosphoric acid, phytic acid and zinc chloride. Then the two pigments were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), thermogravimetry analysis (TG) and infrared spectroscopy (FT-IR). The solubility of zinc phosphate and zinc phytate in aqueous solution was analyzed by titration test. The corrosion characteristics of Q235 carbon steel in extracting solutions of zinc phosphate and zinc phytate were examined respectively by Tafel polarization method, electrochemical impedance spectroscopy (EIS) and immersion test. The results showed that the zinc phosphate presents micron-sheet like structure of non-uniform size with thickness in the range of 0.5-1 μm, and the zinc phytate was agglomeration particle with a particle size of 2-5 μm. While after extracting for 2 h, the content of zinc phytate was basically saturated, and it showed that zinc phytate had excellent inhibition effect, which could slow down the corrosion of Q235 steel with inhibition efficiency up to about 90%.

Key words： Q235 steel corrosion zinc phytate inhibition performance

收稿日期: 2023-05-11 32134.14.1005.4537.2023.159

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: 周兰欣，女，2000年生，硕士生

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图1 磷酸锌和植酸锌的表面形貌

图2 磷酸锌和植酸锌的FT-IR谱

图3 磷酸锌和植酸锌的TG曲线

Extracting time / h	Concentration of Zn²⁺ / mol·L^-1		Concentration of PO $4 3 -$ / mol·L^-1
Extracting time / h	Zinc phosphate	Zinc phytate	Zinc phosphate	Zinc phytate
1	5.42 × 10^-6	3.58 × 10^-4	3.61 × 10^-6	3.58 × 10^-4
2	1.23 × 10^-5	7.69 × 10^-4	8.20 × 10^-6	7.69 × 10^-4
4	6.90 × 10^-5	8.13 × 10^-4	4.60 × 10^-5	8.13 × 10^-4
8	6.92 × 10^-5	9.01 × 10^-4	4.61 × 10^-5	9.01 × 10^-4

表1 滴定数据及计算结果

图4 Q235钢电极在不同时间磷酸锌和植酸锌浸出液中的开路电位

图5 Q235钢电极在不同时间磷酸锌和植酸锌浸出液中的电化学阻抗谱

图6 等效电路图

表2 Q235钢电极在不同浸出时间的磷酸锌和植酸锌溶液中EIS拟合结果

图7 Q235钢电极在不同时间浸出液中的Tafel曲线

表3 磷酸锌和植酸锌不同浸出时间下Tafel拟合结果

图8 Q235钢在不同时间磷酸锌浸出液中浸泡后的腐蚀形貌

图9 Q235钢在不同时间植酸锌浸出液中浸泡后的腐蚀形貌

图10 Q235钢在不同浸出液中浸泡后的表面形貌

表4 Q235钢在磷酸锌和植酸锌浸出液中腐蚀后的表面能谱结果 (atomic fraction / %)

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