Formula and technique for neutral rust remover for rust cleaning of sheet material

Abstract

The invention discloses a formula of a neutral rust remover used for rust removal of plates, and the process thereof. By utilizing the formula of the neutral rust remover, the plate is soaked for 2 to 10 min and then rust removal treatment is performed at room temperature and under the environment that PH value is 5 to 7; the neutral rust remover solution per unit volume comprises the following solutes: 0 to 20 ml / L of OP-10, 0 to 30 g / L of sodium silicate, 0 to 30 g / L of thiourea, 5 to 20 g / L of tartaric acid, 0 to 10 g / L of sulfamic acid, and 0 to 30 g / L of citric acid. The neutral rust remover has the advantages that the cost is low, the neutral rust remover can be used at normal temperature, is not easy to generate acid mist and is friendly to both the human body and the environment; furthermore, no damage is caused to the zinc layer on the surface of the plate, and the operation is simple.

Description

technical field [0001] The invention relates to the derusting technology of plates, in particular to a formula of neutral derusting agent for derusting plates and a process for derusting treatment of plates by using the neutral derusting agent. Background technique [0002] The principle of the chemical treatment method is to use the acid liquid to react with the rust (oxide) on the metal surface to be cleaned, so that it is dissolved in the acid liquid, and the hydrogen gas generated by the action of the acid and the metal makes the oxide scale mechanically fall off. It is suitable for complex geometric shapes and precision parts, and meets the needs of large-scale rust removal. At present, the industry often uses a mixture of strong acids or alkalis for cleaning. After cleaning, phosphating treatment is required, which is time-consuming and labor-intensive. This kind of substance will not only corrode the skin, damage the clothes, but also emit an unbearable, strong irrit...

AI Technical Summary

Problems solved by technology

At present, the industry often uses a mixture of strong acids or alkalis to clean the mixture. After cleaning, it needs to be phosphating, which is time-consuming and labor-intensive.

This kind of substance will not only corrode the skin, damage the clothes, but also emit an unbearable, strong irritating smell, which is harmful to human health, unsafe to use, brings great inconvenience to the operator, and seriously pollutes the environment. In the process of derusting, it will inevitably damage the zinc layer on the surface of the plate, so that the plate cannot be used again, resulting in huge economic losses

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