A kind of tin plate passivation solution and passivation process

Abstract

The present invention provides a tinplate passivation solution and a passivation process. The passivation solution provided by the present invention has the following components in terms of mass concentration: 30-40g / L of fluorotitanate ions, 30-40g / L of fluorozirconate ions L, permanganate ion 10‑20g / L, hydrofluoric acid 2‑3ml / L, phosphate 5‑15g / L, organosilane 5‑8g / L, and the rest is water.

Description

technical field

[0001] The invention belongs to the field of passivation, and in particular relates to a passivation solution and a passivation process for tin-plated plates. Background technique

[0002] Tin plate refers to a steel plate coated with a thin layer of metallic tin on the surface. In order to improve the oxidation resistance, corrosion resistance, anti-sulphurization and blackening properties of tinplate, tinplate is usually subjected to passivation treatment. At present, when passivation treatment is performed, the passivation solution is chromium containing hexavalent chromium However, the hexavalent chromium in chromate is a very toxic substance, which is extremely harmful to the environment and the human body. Therefore, developing a chromium-free passivation solution for the passivation of tin-plated plates has become an urgent problem in this field. Contents of the invention

[0003] In view of the above problems, the present invention is proposed to ...