Effect of PSA tin plating process on trace lead in tin coating

doi:10.1016/j.cjche.2015.08.001

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (10): 1716-1720.DOI: 10.1016/j.cjche.2015.08.001

Effect of PSA tin plating process on trace lead in tin coating

Binghu Li^1,2, Kuaikuai Guo¹, Changsheng Liu¹

1 Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, Northeastern University, Shenyang 110819, China;
2 Baoshan Iron & Steel Group, Shanghai 201900, China

收稿日期:2014-11-21 修回日期:2015-07-23 出版日期:2015-10-28 发布日期:2015-11-27
通讯作者: Changsheng Liu
基金资助:
Supported by the Fundamental Research Funds for the Central Universities (04040022212005).

Effect of PSA tin plating process on trace lead in tin coating

Binghu Li^1,2, Kuaikuai Guo¹, Changsheng Liu¹

1 Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, Northeastern University, Shenyang 110819, China;
2 Baoshan Iron & Steel Group, Shanghai 201900, China

Received:2014-11-21 Revised:2015-07-23 Online:2015-10-28 Published:2015-11-27
Supported by:
Supported by the Fundamental Research Funds for the Central Universities (04040022212005).

摘要/Abstract

摘要： In this paper, effects of conditions in phenol sulfonic acid (PSA) plating for tin coating of MR low carbon aluminum killed steel on trace Pb were examined. Trace Pb was measured by atomic absorption spectrometry (AAS) and glow discharge spectrometry, and coating morphology was observed by scanning electronic microscopy (SEM). Corrosion resistance of the tin coating was analyzed by electrochemical methods. The results indicated that Pb content in the tin coating reduced as bath temperature increased. When the temperature exceeded 40 ℃, the grains in the coating were coarse and loose, reducing the corrosion resistance. As current density increased, Pb content increased rapidly,while lowcurrent density plating could lead to drain regions. The plating speed had no obvious effect on trace Pb in tin coating. In the tin plating layer, Pb was enriched at the surface and gradually reduced to zero along the depth. At bath temperature of 40 ℃ and current density of 20 A·dm^-2, the amount of Pb could be less than 100 mg·kg^-1 with excellent corrosion resistance.

关键词: Optimal design, Process control, Safety, Tin plating, Trace Pb, Current density, Bath temperature

Abstract: In this paper, effects of conditions in phenol sulfonic acid (PSA) plating for tin coating of MR low carbon aluminum killed steel on trace Pb were examined. Trace Pb was measured by atomic absorption spectrometry (AAS) and glow discharge spectrometry, and coating morphology was observed by scanning electronic microscopy (SEM). Corrosion resistance of the tin coating was analyzed by electrochemical methods. The results indicated that Pb content in the tin coating reduced as bath temperature increased. When the temperature exceeded 40 ℃, the grains in the coating were coarse and loose, reducing the corrosion resistance. As current density increased, Pb content increased rapidly,while lowcurrent density plating could lead to drain regions. The plating speed had no obvious effect on trace Pb in tin coating. In the tin plating layer, Pb was enriched at the surface and gradually reduced to zero along the depth. At bath temperature of 40 ℃ and current density of 20 A·dm^-2, the amount of Pb could be less than 100 mg·kg^-1 with excellent corrosion resistance.

Key words: Optimal design, Process control, Safety, Tin plating, Trace Pb, Current density, Bath temperature

Binghu Li, Kuaikuai Guo, Changsheng Liu. Effect of PSA tin plating process on trace lead in tin coating[J]. Chinese Journal of Chemical Engineering, 2015, 23(10): 1716-1720.

Binghu Li, Kuaikuai Guo, Changsheng Liu. Effect of PSA tin plating process on trace lead in tin coating[J]. Chin.J.Chem.Eng., 2015, 23(10): 1716-1720.

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Effect of PSA tin plating process on trace lead in tin coating

Effect of PSA tin plating process on trace lead in tin coating

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