发明名称 |
Anti-corrosive hybrid sol-gel film on metallic substrates and method of producing the same |
摘要 |
This invention relates to a method of preparing anti-corrosive hybrid sol-gel film coating on zinc or zinc alloy coated metallic substrates comprising the steps of preparing a mixture of sol-gel from hydrolisable silicon alkoxides, sodium venadate solution combined with colloidal silica in a beaker and vigorously stirred; adding within 20 seconds of two separated phase formation between silica precursors and colloidal silica acetic acid or dilute nitric acid as a catalizer to initiate hydrolysis reaction of silicon alkoxides and condensation reaction in the sol gel composition, continuously stirring the mixture for about 24 hours to form a single phase solution, applying the solution on cleaned zinc or zinc alloy coated metal substrates to form a transparent sol-gel coating film and drying the coated substrates at 50° to 200° C. for 10 to 60 minutes. |
申请公布号 |
US8900670(B2) |
申请公布日期 |
2014.12.02 |
申请号 |
US200812594309 |
申请日期 |
2008.05.23 |
申请人 |
Tata Steel Limited |
发明人 |
Singh Arun Kumar;Rout Tapan K.;Narayan Ramanuj;Verma Anil K.;Bandyopadhyay Nikhiles;Rani Nitu |
分类号 |
B05D3/02;C09D1/02;C23C18/12;C23F11/18;C23C22/53;C09D7/12;C23C22/74;C09D5/08;C08K5/057;C08K3/18 |
主分类号 |
B05D3/02 |
代理机构 |
Venable LLP |
代理人 |
Venable LLP ;Kaminski Jeffri A. |
主权项 |
1. A method of preparing anti-corrosive hybrid sol-gel film coating on zinc or zinc alloy coated metallic substrates comprising the steps of preparing a mixture of sol-gel from hydrolisable silicon alkoxides, sodium vanadate solution combined with colloidal silica in a beaker and vigorously stirred; adding within 20 seconds of two separated phase formation between silicon alkoxides and colloidal silica, acetic acid or dilute nitric acid as a catalizer to initiate hydrolysis reaction of silicon alkoxides and condensation reaction in the sol gel composition, continuously stirring the mixture for about 24 hours to form a single phase solution, applying the solution on cleaned zinc or zinc alloy coated metal substrates to form a transparent sol-gel coating film and drying the coated substrates at 50° to 200° C. for 10 to 60 minutes. |
地址 |
Jamshedpur IN |