Title:
ANTI-RUST TREATMENT SOLUTION FOR WELDED STEEL PIPES, CHEMICAL CONVERSION TREATMENT METHOD FOR WELDED STEEL PIPE, WELDED STEEL PIPE AND FORMED PRODUCT OF WELDED STEEL PIPES
Document Type and Number:
WIPO Patent Application WO/2019/146584
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an anti-rust treatment solution for welded steel pipes that can further enhance the weather resistance of a chemical conversion treated film. The purpose is achieved by an anti-rust treatment solution for welded steel pipes that includes an organic resin including a fluorine resin, a Group IV element-containing compound or ions of the Group IV element, and at least one binding promoter selected from the group consisting of n-methyl-2-pyrrolidone and an ester compound of an adipic acid or phthalic acid and a C1-C3 alcohol, wherein the content of the Group IV element-containing compound or ions of the Group IV element is 0.5-6 g/L in terms of metal atoms, and the sum of the content of the Group IV element-containing compound or ions of the Group IV element in terms of metal atoms and the content of the binding promoter is 20 g/L or less.
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Inventors:
MATSUNO MASANORI
UENO SHIN
UENO SHIN
Application Number:
PCT/JP2019/001821
Publication Date:
August 01, 2019
Filing Date:
January 22, 2019
Export Citation:
Assignee:
NISSHIN STEEL CO LTD (JP)
International Classes:
C23C22/62; B32B1/08; B32B15/082; C23C22/68; C23F11/00
Foreign References:
| JP6271062B1 | 2018-01-31 | |||
| JP2003201578A | 2003-07-18 | |||
| JP2016121390A | 2016-07-07 | |||
| JP2003105563A | 2003-04-09 |
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
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