Pretreatment technique for steel member hot spraying

Abstract

The invention discloses a pretreatment technique for the heat spraying for a steel part, belonging to the technique field of surface treatment. The process is as follows: surface cleaning-degreasing-derustin-sealing-surface coarsening-heat spraying. The invention has the advantages that the technique has simple requirements to the treatment of the parts, the distribution of the technique, and is easy to operate, good pretreatment quality, which warrants the quality of the heat spraying; besides, the technique requires little investment to the infrastructure, and has high treatment efficiency, low construction cost, and good economic benefit.

Description

technical field

[0001] The invention relates to a pretreatment technology for thermal spraying of iron and steel components, and belongs to the technical field of metal surface treatment. In particular, it relates to a pretreatment process for thermal spraying of steel components. Background technique

[0002] Due to long-term exposure to the atmosphere, the steel components for outdoor use are exposed to climate change, sun and rain, and the surface is rapidly oxidized to form a layer of ferric oxide, which seriously affects the strength and service life of the steel structure. In order to prevent oxidation on the surface of steel components, most steel structures are protected by hot-spraying zinc, hot-spraying aluminum and other processes on the surface of the steel structure. The anti-corrosion period can reach more than 30 years without maintenance.

[0003] The treatment before thermal spraying of iron and steel metal generally adopts the following process: surface cl...