Phosphorus-free antirust metal cleaning agent and preparation method therefor

Abstract

The invention discloses a phosphorus-free antirust metal cleaning agent and a preparation method therefor. The phosphorus-free antirust metal cleaning agent is prepared from the following raw materials in percentage by weight: 20% of sodium carbonate, 10% of a chelating agent, 10% of dodecylbenzene sulfonic acid, 2% of sodium benzoate, 3% of sodium hydroxide, 8% of a washing assistant, 3% of a rust-proof corrosion inhibitor, 4% of a defoaming agent, and 40% of water. The chelating agent is sodium nitrilotriacetate or sodium gluconate, or a mixture of sodium nitrilotriacetate and sodium gluconate; the washing assistant is sodium citrate and sodium silicate; and the defoaming agent is an organic silicone oil defoaming agent. The preparation method mainly comprises the following steps: adding sodium carbonate, dodecylbenzene sulfonic acid, sodium benzoate and sodium hydroxide into a reaction container for uniform stirring, then adding the chelating agent, the washing assistant, the antirust corrosion inhibitor, the defoaming agent and water for uniform mixing to obtain the phosphorus-free antirust metal cleaning agent. The phosphorus-free antirust metal cleaning agent has the advantages of high heavy oil stain removal capacity, high cleaning speed and the like.

Description

technical field [0001] The invention relates to the field of mechanical industry cleaning agents, in particular to a phosphorus-free antirust metal cleaning agent and a preparation method thereof. Background technique [0002] At present, the cleaning agents used to clean metal materials at home and abroad mainly include three categories. The first category is solvent cleaning agent, such as gasoline, kerosene, diesel oil and other solvents, but this type of cleaning agent has been gradually eliminated due to reasons such as waste of energy, inflammability and explosion, and unsafety. The second category is halogenated alkanes cleaning agent, such as 1-1-1 trichloroethane etc., this type of cleaning agent is because of high cleaning cost and uneconomical, thereby limiting its scope of promotion. The third category is water-based cleaning agents. The cleaning agents commonly used at present all have shortcomings such as corrosion to metal surfaces, poor rust resistance, poor...

AI Technical Summary

Problems solved by technology

The first category is solvent cleaning agents, such as gasoline, kerosene, diesel and other solvents, but such cleaning agents have been gradually eliminated due to energy waste, flammability, explosion, and unsafety.

The second category is halogenated alkanes cleaning agent, such as 1-1-1 trichloroethane etc., this type of cleaning agent is because of high cleaning cost and uneconomical, thus limiting its promotion scope

The third category is water-based cleaning agents. The cleaning agents commonly used at present all have shortcomings such as corrosion to metal surfaces, poor rust resistance, poor rinsing performance, poor biodegradability, toxicity, and excessive phosphorus content, which cannot well meet the production requirements. process requirements

Because aluminum itself is relatively active, the existing cleaning agents usually use highly acidic or alkaline cleaning solutions in order to have a good cleaning effect. In this way, the cleaning process is more corrosive to aluminum, which to a certain extent causes aluminum Loss

Moreover, the cleaning effect of the existing cleaning agents is not very satisfactory, especially for metal parts with heavy oil stains, the aluminum material after cleaning is prone to black surface layer, which brings troubles to subsequent processing, especially for the processing of precision components cause confusion

In addition, the existing cleaning agent is highly corrosive to the equipment, which increases the cost of the equipment

At the same time, these cleaning agents have a long cleaning time, requiring 10 to 30 minutes of cleaning time, and have poor rinsing properties