Rust removal composition

A technology of composition and mixture, which is applied in the direction of anti-corrosion composition, detergent composition, organic cleaning composition, etc., can solve the problems of slow rust removal, iron oxidation corrosion, rust corrosion, etc., and achieves convenient dilution and use, The effect of safe and reliable use and prevention of secondary corrosion

Inactive Publication Date: 2012-03-14
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 po

Method used

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  • Rust removal composition
  • Rust removal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] A. Experimental method of rust removal rate

[0045] The rust removal rate experiment uses tinplate, which is cut into 3cm×3cm iron sheets, and both sides are polished and rubbed with sandpaper. Then place the tinplate sheet in a salt spray box (ASTM B117) for 48 hours to form a rust layer on both sides.

[0046] Dilute the prepared solution 7 times with water, and soak the treated tinplate sheet in the diluted solution for 15 minutes.

[0047] The rust removal rate (%) is expressed by the following formula:

[0048]

[0049] a: weight of iron sheet with rust attached before derusting (g);

[0050] b: the weight (g) of the iron sheet after derusting, washing and drying by reagent derusting agent;

[0051] c: The weight (g) of the iron sheet when it is not rusted.

[0052] The larger the value of the rust removal rate, the better the rust removal effect.

[0053] B: Corrosion scoring criteria are as follows:

[0054]In the corrosion scoring experiment, X-Rite 84...

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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...

Claims

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Application Information

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IPC IPC(8): C23G1/04C11D7/08C11D7/22C11D1/12C11D3/20
CPCC23G1/088C11D1/143C11D1/22C11D3/0073C11D3/042C11D3/046C11D3/2006C11D3/2068C11D3/2075C11D3/28C11D3/30C11D3/349C11D11/0029C23G1/06
Inventor 谢颖玮刘颋邱凯
Owner 3M INNOVATIVE PROPERTIES CO
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