酸洗工艺对不同锡量二次冷轧镀锡板耐蚀性能的影响

doi:10.11902/1005.4537.2025.066

中国腐蚀与防护学报

2025, Vol. 45

Issue (4): 939-946 CSTR: 32134.14.1005.4537.2025.066 DOI: 10.11902/1005.4537.2025.066

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酸洗工艺对不同锡量二次冷轧镀锡板耐蚀性能的影响

周谦永¹, 赖漾², 李谦²^,³(

)

1 宝山钢铁股份有限公司冷轧厂上海 200941
2 上海大学材料科学与工程学院省部共建高品质特殊钢冶金与制备国家重点实验室上海 200444
3 重庆大学材料科学与工程学院国家镁合金材料工程技术研究中心国家先进铸造技术重点实验室重庆 400044

Effect of Pickling Process on Corrosion Resistance of Double Cold-reduced Tinplate with Different Tin Coating Masses

ZHOU Qianyong¹, LAI Yang², LI Qian²^,³(

)

1 Cold Rolling Mill, Baoshan Iron and Steel Co., Ltd., Shanghai 200941, China
2 School of Materials Science and Engineering & State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China
3 College of Materials Science and Engineering & National Engineering Research Center for Magnesium Alloys & National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, China

引用本文:

周谦永, 赖漾, 李谦. 酸洗工艺对不同锡量二次冷轧镀锡板耐蚀性能的影响[J]. 中国腐蚀与防护学报, 2025, 45(4): 939-946.
Qianyong ZHOU, Yang LAI, Qian LI. Effect of Pickling Process on Corrosion Resistance of Double Cold-reduced Tinplate with Different Tin Coating Masses[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(4): 939-946.

全文: PDF(16421 KB) HTML

摘要:

酸洗工艺是镀锡板生产的关键步骤，其改变会影响镀锡板的腐蚀行为，随镀锡量的改变，该影响也随之变化。目前酸洗工艺与镀锡量对镀锡板腐蚀行为的耦合影响机制缺乏系统研究。本研究探讨了不同镀锡量下，电解酸洗与化学酸洗对镀锡板耐蚀性能的影响机制及区别。采用扫描电镜(SEM)、中性盐雾试验(NSS)以及电化学测试方法，对化学酸洗和电解酸洗工艺下不同镀锡量镀层耐蚀性能和微观组织进行了表征和分析。结果表明，随着镀锡量增加，镀层的致密性和完整性提高，改用化学酸洗工艺对镀锡板性能的负面影响逐渐减弱，在高镀锡量条件下化学酸洗能够提供与电解酸洗相近的耐蚀性能。

关键词 ：镀锡板, 酸洗, 耐蚀性能, 电化学性能

Abstract：

The pickling process is a crucial step in the production of tinplate, and alterations in process parameters can affect the corrosion behavior of tinplate, which varies with changes in the tin coating mass. Currently, there is a lack of systematic research on the coupled influence mechanism of the pickling process and tin coating mass on the corrosion behavior of tinplate. Herein, the influence of electrolytic pickling and chemical pickling on the corrosion resistance of tinplates with different tin coating mass was assessed by means of neutral salt spray (NSS) testing, electrochemical testing methods and scanning electron microscopy (SEM), in terms of the variation of corrosion resistance and microstructure of coatings with varying tin coating weights and pickling processes. The results indicate that as the tin coating mass increases, the negative impact of switching to a chemical pickling process on the properties of tinplate gradually diminishes, which may be ascribed to the improved coating microstructure and property with the increasing tin mass. Furthermore, in case of high tin coating mass, the tinplate being subjected to chemical pickling can provide corrosion resistance comparable with that being subjected to electrolytic pickling.

Key words： tinplate pickling corrosion resistance electrochemical performance

收稿日期: 2025-02-25 32134.14.1005.4537.2025.066

ZTFLH:

TG174

通讯作者: 李谦，E-mail：cquliqian@cqu.edu.cn，研究方向为金属腐蚀与防护

Corresponding author: LI Qian, E-mail: cquliqian@cqu.edu.cn

作者简介: 周谦永，男，1981年生，硕士，工程师

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.066 或 https://www.jcscp.org/CN/Y2025/V45/I4/939

图1 不同镀锡量的镀锡板经电解酸洗或化学酸洗后中性盐雾腐蚀不同时间后的宏观形貌

图2 经电解酸洗和化学酸洗工艺的不同镀锡量的镀锡板在中性盐雾实验过程中的失重曲线

图3 经电解酸洗或化学酸洗的不同镀锡量的镀锡板样品在3.5%NaCl水溶液中的动电位极化曲线

表1 动电位极化曲线的拟合电化学参数

图4 经电解酸洗或化学酸洗的不同镀锡量的镀锡板在3.5%NaCl水溶液中的电化学阻抗谱图

图5 EIS拟合等效电路模型图

Coating mass / g·m^-2	R_s / Ω·cm²	Q_m-Y₀ / Ω^-1·cm^-2·s $- n 1$	Q_m-n	R_m / Ω·cm²	Q_dl-Y₀ / Ω^-1·cm^-2·s $- n 1$	Q_dl-n	R_ct / Ω·cm²
EP-1.1	8.17	6.62 × 10^-6	0.77	4.21 × 10⁵	3.86 × 10^-6	0.86	3.13 × 10³
CP-1.1	10.55	1.03 × 10^-5	0.78	1.39 × 10⁵	6.45 × 10^-6	0.86	1.62 × 10³
EP-5.6	7.32	9.35 × 10^-6	0.90	4.98 × 10⁶	2.17 × 10^-5	0.79	9.94 × 10²
CP-5.6	8.63	7.28 × 10^-6	0.89	2.31 × 10⁶	2.85 × 10^-5	0.79	1.78 × 10²
EP-11.2	12.34	8.21 × 10^-6	0.88	4.63 × 10⁶	1.42 × 10^-5	0.76	3.19 × 10³
CP-11.2	6.76	8.62 × 10^-6	0.89	3.59 × 10⁶	2.66 × 10^-5	0.80	7.85 × 10²

表2 图4中电化学阻抗谱的拟合电化学参数

图6 经电解酸洗或化学酸洗的不同镀锡量的镀锡板的SEM表面形貌及EDS元素面扫描

表3 镀锡板表面元素含量的EDS分析结果

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