Stability-improved powdery metal degreasing agent

Abstract

A stable powdery metal degreasing agent is successfully developed in the invention. A surfactant is chemically modified to generate a new terminated surfactant, and the new terminated surfactant is used to prepare the powdery metal degreasing agent in order to improve the stability of the surfactant in the powdery degreasing agent in a strong alkali system. The powdery degreasing agent comprises,by weight, 5-20 parts of sodium hydroxide, 10-30 parts of sodium carbonate, 0.1-5 parts of sodium gluconate, 0.1-5 parts of sodium tripolyphosphate, 1-5 parts of the terminated surfactant and 1-5 parts of ethylene glycol monobutyl ether.

Description

technical field [0001] The invention relates to the technical field of metal surface cleaning, in particular to a stable powdery metal degreasing agent. Background technique [0002] During the manufacture, transportation, storage and use of metal workpieces, due to the needs of machining and rust prevention, the surface is coated with grease. These oils are based on mineral oil and vegetable oil, and are added with various organic or inorganic additives. Therefore, in the surface treatment of metal materials, degreasing is an important process, and the degreasing degree of the metal surface will directly affect the subsequent processing quality of the workpiece. [0003] The oil composition on the surface of metal workpieces is relatively complex. One type is saponified oil based on fatty acid glyceride, which can be removed by saponification with alkali; the other type is mineral oil (non-saponified oil), which can be removed by emulsification. [0004] At present, most ...

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Problems solved by technology

[0004] At present, most of the metal degreasing agents on the market are liquid products, and the content of active ingredients is limited, which increases the cost of packaging, storage and transportation.

However, due to the poor alkali resistance of surfactants in powdery degreasing agents, structural changes usually occur when solid alkaline substances are in direct contact. The intuitive impact is discoloration and degreasing ability, which affects product quality.

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