| 摘要 |
A method of producing shaped articles made from single-sidedly or double-sidedly galvanized steel sheet, starting from galvanized steel strip, at least one of the steps of the method being a transport operation, and in which, for protection from black-spot corrosion, a corrosion preventive oil is applied which comprises at least one phosphoric acid polyoxyalkylene ester. |
| 主权项 |
1. A method comprising producing shaped articles made from galvanized steel by a process comprising—in order—:
(1) applying a corrosion preventive oil to a surface of a galvanized steel strip in an amount of 0.25 to 5 g/m2, (2) transporting the oiled, galvanized steel strip to a fabrication site for shaped articles, and (3) separating and forming the oiled, galvanized steel strip into shaped articles,wherein the corrosion preventive oil comprises 20 to 100% by weight, based on the total amount of all of the components of the corrosion preventive oil, of at least one phosphoric ester (A) of the general formula
[R2—(—O—CH(R1)—CH2—)n—O—]k—P(═O)—(OX)3-k and where R1, R2, X, n, and k have the following definitions:k: 1 or 2,n: a number from 10 to 70,R1: independently at each occurrence a radical selected from the group consisting of H, C1 to C10 alkyl radicals or aryl-substituted C2 to C10 alkyl radicals, wherein for at least 50 mol % of the radicals R1 is a methyl radical,R2: H or a C1 to C30 alkyl radical,X: H or a cation 1/mYm+, where m is a natural number from 1 to 3. |
