Pig iron casting surface rust removal method based on paste acidic rust remover

Abstract

The invention discloses a pig iron casting surface rust removal method based on a paste acidic rust remover. A liquid storage box is included, strip-shaped grooves in the bottom wall of the liquid storage box are clamped with strip-shaped grinding blocks, stainless steel thin pipes are arranged on the bottom wall of the liquid storage box, a feeding port is formed in the side wall of the liquid storage box, a piston plate is sleeved with the inner wall of the liquid storage box in a sealed manner, the piston plate is connected with telescopic rods, and the telescopic rods communicate with an air pump; and a grab handle and supporting legs are arranged on the top wall of the liquid storage box, and the grab handle is provided with a switch button and finger grooves. The invention further provides the pig iron casting surface rust removal method based on the paste acidic rust remover. The novel liquid storage box is designed, rust removal acid liquid, a hydroxyethyl cellulose aqueous solution and fine sand are sequentially poured into the liquid storage box, paste is generated through forced hydrolyzability of TiCl4 and tetraethoxysilane, the paste is extruded to the surface of a casting through the stainless steel thin pipes, the strip-shaped grinding blocks are used for rubbing, grinding and brushing, after multiple times of rubbing and grinding, slightly yellow white foam is formed, rust or burrs and burr defects which are difficult to treat can be cleaned up, and complex treatment such as cutting is not needed.

Description

technical field [0001] The invention relates to the technical field of casting surface treatment, in particular to a method for removing rust on the surface of pig iron castings based on a paste-like acid rust remover. Background technique [0002] During the process of processing, transportation, storage, etc., the surface of pig iron castings often has oxide scales, mold sand, welding slag, dust, oil and other dirt left by rust molding, which need to be derusted. What's more, some castings have been stored improperly or have been in a highly corrosive and high-humidity environment for a long time. Chemical rust removal methods cannot be solved and may require cutting and grinding. [0003] At present, chemical acid solution rust removal still occupies a dominant position. The so-called chemical rust removal is to use pickling to make it chemically react with rust, so that its rust components can be changed into ferric chloride or iron sulfate, so as to achieve the purpose...

AI Technical Summary

Problems solved by technology

What's more, some castings have been stored improperly or have been in a highly corrosive and high-humidity environment for a long time. Chemical rust removal methods cannot be resolved and may require cutting and grinding

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