Low-temperature slag-free zinc bonderite as well as preparation method and applications thereof

Abstract

The invention belongs to the field of metal surface processing, and discloses a low-temperature slag-free zinc bonderite comprising the following components in parts by weight: 280-285 parts of bonderite, 100-105 parts of phosphoric acid, 93-96 parts of zinc oxide, 15-16 parts of sodium carbonate, 2.0-2.2 parts of citric acid, 1.0-1.2 parts of sodium fluoride, 1.0 part of sodium nitrite, 48-50 parts of complexing agent, and the balance of water, wherein, the total components by weight are 1000 parts, the complexing agent is an aqueous solution composed of ethylene diamine tetraacetic acid (EDTA), citric acid, tartaric acid and sodium tungstate. By utilizing the bonderite provided by the invention, the prejudice that a large amount of dregs must exist in the zinc bonderite considered by the traditional view is overcome, and nearly no slag exists in phosphating, the phosphating time is short, and the temperature is low. The preparation method is simple, and is easily operated and controlled.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to a low-temperature slag-free zinc-based phosphating agent. Background technique [0002] As an anti-corrosion and decorative treatment for metal surfaces, phosphating is more and more widely used in today's increasingly industrialized world. For example, it plays an irreplaceable role in various industries such as furniture, home appliances, automobiles, ships, machinery, weapons, and aerospace. [0003] The progress of society and the development of industry have accelerated the pollution of the environment, which has brought unprecedented pressure on our green homeland. Phosphating, as a traditional essential pretreatment technology, has also been greatly challenged. Because the phosphating agent will continuously produce a large amount of sediment during the process of treating the metal surface. At the same time, the phosphating agent is easy to age, a...

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings and deficiencies of existing zinc-based phosphating agents such as sediment, high energy consumption, high labor intensity, and waste of resources, the inventor first provided a low-temperature slag-free zinc-based phosphating agent, so that the phosphating agent has It can be used without heating, no slag is generated, and no replacement is required; another purpose of the invention is to provide the preparation method of the low-temperature slag-free zinc-based phosphating agent