Chemic spent meal in use for processing surfaces of ferrous metal, and preparation method

Abstract

This invention discloses a method for preparing chemical degreasing powder for surface treatment of ferrous metals. The degreasing powder is composed of: sodium carbonate 20-34 parts, sodium tripolyphosphate 14-30 parts, polyoxyethylene nonyl phenyl ether 1-6 parts, coconut oil diethanolamide 1-5 parts, sodium dodecyl sulfate 2-8 parts, and sodium hydroxide 25-45 parts. The method comprises: mixing sodium carbonate and sodium tripolyphosphate, stirring uniformly, adding polyoxyethylene nonyl phenyl ether and coconut oil diethanolamide, stirring uniformly, adding sodium dodecyl sulfate and sodium hydroxide, and stirring uniformly to obtain the final product. The degreasing powder has such advantages as good emulsification property, good cleaning effect, short degreasing time (shortened by 1-2 times), high cleaning rate (higher than 99.8%), low oxygen consumption, no toxicity and high biodegradability, and can be used repeatedly. Besides, the degreasing powder is environmentally friendly.

Description

technical field [0001] The invention relates to a chemical degreasing powder used for degreasing treatment on ferrous metal surfaces, and to a preparation method of the degreasing powder. Background technique [0002] Chemical degreasing treatment of ferrous metal surface is one of the important procedures in the pretreatment process of electroplating. Although several chemical degreasing powders currently used in this treatment can basically meet the requirements of electroplating production, due to their unreasonable and non-standard components, contents and preparation methods, there are still slow degreasing speeds and many degreasing times. The high chemical oxygen demand of the degreasing solution directly affects the production efficiency and production cost in the production of ferrous metal electroplating. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a chemical degreasing powder for ferrous metal sur...

AI Technical Summary

Problems solved by technology

Although several chemical degreasing powders currently used in this treatment can basically meet the requirements of electroplating production, due to their unreasonable and non-standard components, contents and preparation methods, there are still slow degreasing speeds and many degreasing times. The problem of large chemical oxygen demand in degreasing liquid directly affects the production efficiency and production cost in ferrous metal electroplating production