发明名称 |
PROCESS FOR PRODUCTION OF TIN-PLATED STEEL SHEETS, TIN-PLATED STEEL SHEETS AND CHEMICAL CONVERSION TREATMENT FLUID. |
摘要 |
<p>A chemical conversion treatment fluid which contains aluminum primary phosphate in an amount exceeding 18g/L and up to 200g/L and has a pH of 1.5 to 2.4; and a process for the production of tin-plated steel sheets which comprises forming an Sn-containing plating layer on at least one side of a steel sheet in a coating weight of 0.05 to 20g/m<sup>2</sup> per side, subjecting the plated steel sheet either to dipping in the chemical conversion treatment fluid or to cathodic electrolysis in the chemical conversion treatment fluid at a current density of 10A/dm<sup>2</sup> or below, and then drying the resulting steel sheet to form a chemical conversion coating. The process involving the use of the treatment fluid can give, through low-cost chemical conversion treatment and even without using Cr causative of environmental problems, a tin-plated steel sheet wherein the surface appearance or the close adhesion of a coating is inhibited from being deteriorated by surface oxidation of the tin plating layer.</p> |
申请公布号 |
MX2010011889(A) |
申请公布日期 |
2011.01.25 |
申请号 |
MX20100011889 |
申请日期 |
2009.05.11 |
申请人 |
JFE STEEL CORPORATION |
发明人 |
HIROKI IWASA;TAKESHI SUZUKI;NORIHIKO NAKAMURA |
分类号 |
C23C22/20;C23C28/00;C25D5/26;C25D5/50;C25D11/36 |
主分类号 |
C23C22/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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