A metal surface treatment passivation solution

Abstract

The invention relates to a metal surface treatment passivation liquid which comprises 1-20g / L zinc nitride, 5-40g / L inorganic acid, a 5-50g / L dispersant and a 1-10g / L modified mesoporous nano material. The modified mesoporous nano material is a polybasic acid grafted mesoporous nano material, and the percent grafting of polybasic acid is 1-5wt%. A film with extremely good corrosion resistance andadhesive force is obtained on the metal surface treated by the passivation liquid.

Description

technical field [0001] The invention relates to a metal surface treatment passivation solution. Background technique [0002] Metals in the atmosphere will react chemically or electrochemically with oxygen, water and other impurities under certain conditions to cause metal corrosion. Metal corrosion not only damages the metal material itself in terms of its shape, color and mechanical properties, but more importantly, it reduces the quality level of its products, and damages its precision and sensitivity. Although stains from corrosion of metal surfaces can be removed from the metal substrate, these methods are often time consuming and also reduce the strength of the metal. In addition, when the metal surface is coated with polymer coatings, adhesives or rubber preservatives, the corrosion of the metal surface will cause the loss or weakening of the adhesion between the preservative coating and the metal surface, which cannot play a good role in anti-corrosion. Effect. Th...

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Problems solved by technology

At present, the main research on chromium-free passivation technology at home and abroad includes molybdate passivation, silicate passivation, titanium salt passivation, rare earth alloy passivation, organic matter passivation and phytic acid passivation, but there is no one without Chromium passivation can completely replace the traditional chromate passivation process in production

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