Environment-friendly composite stainless steel cleaning agent and preparation method thereof

Abstract

The invention discloses an environment-friendly composite stainless steel cleaning agent and a preparation method thereof. The environment-friendly composite stainless steel cleaning agent comprises organic acid citric acid, ammonium hydroxide, zinc salt, a chelating agent, a fluoride additive, a surface active agent, a defoaming agent and water. The zinc salt is zinc sulfate or zinc dihydrogen phosphate. The chelating agent is hydroxy carboxylic acid matter. The fluoride additive is NaF or Na2SiF6 or NH4HF2. The surface active agent is polyoxyethylene ether matter. When the cleaning agent isprepared, firstly, the zinc salt is added into water, and the zinc salt is completely dissolved uniformly; and the citric acid is added under the proper temperature, after stirring is carried out to complete dissolution, the ammonium hydroxide is added to adjust the PH, the fluoride additive, the chelating agent, the surface active agent and the defoaming agent are added sequentially, stirring iscarried out to obtain a solution homogeneous phase, and preparation of the environment-friendly composite cleaning agent is completed. The organic acid citric acid is used as main acid of the environment-friendly composite stainless steel cleaning agent, pollution to the environment is small, corrosion to equipment is small, waste liquid is easily treated, and three procedures including stainlesssteel oil removal, rust removal and passivation can be completed in one step during cleaning.

Description

technical field [0001] The invention relates to the technical field of industrial cleaning agents, in particular to an environment-friendly composite stainless steel cleaning agent which is non-toxic and harmless and has a simple cleaning process. Background technique [0002] The cleaning of industrial equipment is to meet the requirements of full-load production process design, and it is a necessary means to create good start-up production conditions and ensure the smooth start-up of feeding and production. To remove the scale on the equipment, the maintenance and expansion of the in-service equipment require industrial cleaning to make it work normally and efficiently. At present, domestic stainless steel equipment must undergo chemical cleaning treatments such as degreasing, descaling, descaling, and passivation protection before it is completed and put into production and during maintenance. Generally, it will go through multiple steps such as degreasing, pickling, and ...

AI Technical Summary

Problems solved by technology

These substances themselves have certain corrosiveness to equipment, are highly toxic and difficult to dispose of waste liquid, and cause serious environmental pollution. For example, the use of nitric acid and sodium nitrite will produce toxic nitrogen oxide gas NO in the cleaning process. X

Moreover, this process needs to be cleaned step by step in different systems. The process is quite cumbersome and will waste more resources such as water, time, and manpower.