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Priority claimed from JP2000342938Aexternal-prioritypatent/JP3302677B2/en
Priority claimed from JP2001183044Aexternal-prioritypatent/JP3302684B2/en
Application filed by Nisshin Steel Co LtdfiledCriticalNisshin Steel Co Ltd
Application grantedgrantedCritical
Publication of TWI245811BpublicationCriticalpatent/TWI245811B/en
A new processed steel sheet comprises a steel base coated with a Zn or its alloy plating layer and a converted layer, which contains both of at least an insoluble or scarcely-soluble metal compound and at least a soluble metal compound. The insoluble or scarcely-soluble compound may be one ore more of valve metal oxides or hydroxides, and the soluble compound may be one or more of valve metal fluorides. The converted layer may be also composed of one ore more of complex compounds of Mn and Ti. The insoluble or scarcely-soluble compound acts as a barrier for insulation of a steel base from an atmosphere, while the soluble compound exhibits a self-repairing faculty to repair defective parts of the converted layer. Due to the converted layer, the processed steel sheet is remarkably improved in corrosion resistance, without presence of chromium compounds which would put harmful influences on the environment.
Description
1245811 六、申請專利範圍 8 .如申請專利範圍第5項之經化學處理鋼片，其中轉化層 更包含一或多種不溶性或可溶性的磷酸鹽及複合磷酸 〇 9 .如申請專利範圍第5項之經化學處理鋼片，其中轉化 層還含有一或多種有機酸鹽。1245811 6. Scope of patent application 8. For example, the chemically treated steel sheet of scope 5 of the patent application scope, wherein the conversion layer further contains one or more insoluble or soluble phosphates and composite phosphates. 9 The chemically treated steel sheet, wherein the conversion layer further contains one or more organic acid salts.
TW90127274A2000-05-102001-11-02Chemically processed steel sheet improved in corrosion resistance
TWI245811B
(en)
METHOD FOR IMPROVING CORROSION RESISTANCE OF SUBSTRATES OF METALS USING MIXTURES OF AMINOSILANS AND MULTI-SILILFUNCTIONAL SILANOS; COMPOSITIONS THAT INCLUDE SUCH MIXTURES OF AMINOSILANS AND SILANOS MULTI-SILILFUNCTIONAL MEASUREMENTS AND COMMON SOLUTIONS
Chrome-free resin composition having good alkaline resistance and processibility, method for surface-treated steel sheet using the same and surface-treated steel sheet
Non-phosphorus chemical conversion treatment agent for improving the lubricity of the plastic working of a metal material, treatment liquid, chemical conversion film and metal material with chemical conversion film