This invention discloses a
rust-proof steel wire and its preparation process, belonging to the field of steel wire post-treatment technology. The
rust-proof steel wire comprises a
copper-plated steel wire and a
passivation layer on the surface of the
copper-plated steel wire. The
passivation layer is made from a
passivation solution, which comprises the following raw materials in the indicated
mass fractions: 4-8% vegetable fatty acids, 2-6%
boric acid, 1-3%
cerium ammonium nitrate, 2-8% polyepoxysuccinic acid terpolymer, 1-3%
polyacrylamide, 0.5-2% disodium ethylenediaminetetraacetate, 4-6% aminosilane
coupling agent, and the balance being deionized water. The polyepoxysuccinic acid terpolymer contains
thiourea molecules in its side chains. The
rust-proof steel wire, through the combination of raw materials in the passivation solution, obtains a passivation layer that is a composite of organic and inorganic substances, thereby constructing a dual
physical barrier that provides long-term rust protection for the steel wire. Simultaneously, the passivation layer also has a certain
coupling effect, which can improve the bonding force between the rust-proof steel wire and the plastic matrix, enhancing the adaptability of the rust-proof steel wire in plastic hoses.