Rust removal composition

Abstract

The invention provides a rust removal combination, including, based on a total weight of the composition, 10-20% of inorganic acid, 1-10% of organic acid, 1-8% of osmotic agent selected from at least one of C2-C4 short chain ethers and short chain alcohols, 2-10% of sulfonic acid and / or sulfonate anionic surfactant, 0.5-10% of corrosion inhibitor and the balance of water.

Description

technical field [0001] The present invention relates to a rust-removing composition, in particular to a metal rust-removing composition, which is used, for example, for cleaning medical or commercial metal appliances. Background technique [0002] During the use of medical stainless steel medical instruments, rust and corrosion often occur. The main reasons are divided into three categories: 1. Instruments often encounter organic pollutants such as disinfectants, human secretions, body fluids, and blood. The salt and iodine contained in the pollutants have a certain corrosion and damage effect on the chromium layer, especially the damage caused by the dried organic pollutants on the instrument. 2. Chemical or physical disinfection is usually required after use of the instrument. Chlorine-containing disinfectant, peracetic acid, acidic potential water, and high temperature and high humidity environment will cause the nickel-chromium layer and even the iron of the instrument t...

AI Technical Summary

Problems solved by technology

[0002] During the use of medical stainless steel medical instruments, rust and corrosion often occur. The main reasons are divided into three categories: 1. Instruments often encounter organic pollutants such as disinfectants, human secretions, body fluids, and blood. The salt and iodine contained in the pollutants have a certain corrosion and damage effect on the chromium layer, especially the damage caused by the dried organic pollutants on the instrument

2. Chemical or physical disinfection is usually required after use of instruments. Chlorine-containing disinfectant, peracetic acid, acid potential water and high temperature and high humidity environment will cause the nickel-chromium layer and even iron of the instrument to be oxidized and corroded

3. During the cleaning process of the instrument, many illegal operations, such as scrubbing the dried blood on the instrument with a steel ball or a bristle brush, caused the chromium layer of the instrument to be destroyed

Also some rust removers reported in the literature are phosphates, surfactants and corrosion inhibitors, but the rust removal rate is slow and the rust removal rate is general, such as US2009032058A, CN101463481A, etc.

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