Ca <sup>2+</sup>和臭氧对A3碳钢表面磷化膜的影响

材料研究学报

2010, Vol. 24

Issue (1): 44-50

研究论文

本期目录 | 过刊浏览

Ca ²⁺和臭氧对A3碳钢表面磷化膜的影响

盛敏奇¹; 王毅^1;2; 钟庆东¹; 林海¹; 周琼宇¹; 卫银银³

1.上海大学上海市现代冶金与材料制备重点实验室上海 200072
2.上海电力学院能源与环境工程学院上海 200090
3.华东师范大学化学系上海 200062

Influence of Ca ²⁺ and Dissolved Ozone in Phosphating Solution on Phosphate Coating on A3 Carbon Steel

SHENG Minqi ¹; WANG Yi ^1;2; ZHONG Qingdong ¹; LIN Hai ¹; ZHOU Qiongyu ¹; WEI Yinyin³

1.Shanghai Key Laboratory of Modern Metallurgy and Material Processing; Shanghai University; Shanghai 200072
2.School of Energy Sources and Environment Engineering; Shanghai University of Electric Power; Shanghai 200090
3.Department of Chemistry; East China Normal University; Shanghai 200062

引用本文:

盛敏奇王毅钟庆东林海周琼宇卫银银. Ca ²⁺和臭氧对A3碳钢表面磷化膜的影响[J]. 材料研究学报, 2010, 24(1): 44-50.
. Influence of Ca ²⁺ and Dissolved Ozone in Phosphating Solution on Phosphate Coating on A3 Carbon Steel[J]. Chin J Mater Res, 2010, 24(1): 44-50.

全文: PDF(1462 KB)

摘要:

在低温磷化条件下, 在磷化液中加入Ca ²⁺并以臭氧作为促进剂, 在A3碳钢表面制备了磷化膜。通过SEM、
XRD、EDS、FT--IR以及腐蚀电化学测试等手段对磷化膜进行表征, 研究了Ca ²⁺和臭氧对磷化膜的结构和性能的影响。结果表明, 在磷化液中添加Ca ²⁺所得磷化膜的质量随着Ca ²⁺浓度的提高而减小, 添加Ca ²⁺可细化磷化膜的晶粒、提高磷化膜的致密度和耐蚀性能; 溶解在磷化液中的臭氧具有细化磷化膜晶粒和促进晶粒生长的作用, 能大幅提高磷化膜晶粒的形核率和磷化膜的主体形成速度。当磷化液的pH=2.70、Ca ²⁺浓度为1.8 g/L、臭氧含量为2.50 mg/L时, 磷化膜的质量为5.46 g/m², 其耐硫酸铜点滴腐蚀时间超过122 s, 在5% NaCl溶液中的腐蚀电流为0.50 μA/cm²。

关键词 ：材料表面与界面 , 磷化 , A3碳钢 , 臭氧 , 钙离子 , 腐蚀 , 表面处理

Abstract：

Phosphate coating on the surface of A3 carbon steel was prepared through the addition of Ca2+ and ozone as an accelerator of phosphating treatment at low temperature, and was characterized by SEM, XRD, EDS, FT-IR and corrosion electrochemical testing. The effects of Ca2+ and dissolved ozone in phosphating solution on the structure and performance of phosphate coating were investigated. The results show that the coating mass decreases with increasing the Ca2+ concentration in phosphating solution. Ca2+ can reduce the crystal size of coating and increase the density and corrosion resistance of coating. The dissolved ozone in phosphating solution can reduce the crystal size of coating and promote the growth of crystal, so the nucleation and formation rates are increased and the corrosion resistance of coating is improved. When pH=2.70, concentration of Ca2+ and ozone were 1.8 g/L and 2.50 mg/L respectively, the mass of phosphate coating was 5.46 g/m2, the corrosion-resistance time of coating with CuSO4 dripping was >122 s, and the corrosion current of phosphating sample was 0.50 μA/cm2 in 5% NaCl solution.

Key words： surface and interface in the materials phosphating A3 carbon steel ozone calcium ion corrosion surface treatment

收稿日期: 2009-07-13

基金资助:

国家自然科学基金50571059, 50615024、教育部新世纪优秀人才支持计划NCET-07-0536、教育部创新团队计划IRT0739资助项目。

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