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Rust removing composition

A technology of composition and mixture, applied in the direction of anti-corrosion composition, detergent composition, organic cleaning composition, etc., can solve the problems of slow rust removal speed and rust removal rate, achieve easy dilution, prevent secondary rust and corrosion Effect

Active Publication Date: 2013-04-24
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some documents disclose a rust remover that is a combination of phosphate, surfactant and corrosion inhibitor, but it has a slow rust removal rate and a moderate rust removal rate (such as US Patent Publication No. 2009032058A, CN101463481A, etc.)

Method used

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  • Rust removing composition
  • Rust removing composition
  • Rust removing composition

Examples

Experimental program
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Effect test

example

[0044] A: Experimental steps to determine the rust removal rate .

[0045] Experiments to determine the rust removal rate were carried out using tinplate. The tinplate was cut into 3 cm x 3 cm slices, and both sides of the slice were rubbed and polished using sandpaper. The tinplate slices were then kept in a salt spray box (ASTM B117) for 48 hours, so that rust layers appeared on both sides.

[0046] The composition described in Table 1 below was diluted seven times with water, and then the treated tinplate chips were soaked in the diluted solution for 15 minutes.

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

[0048]

[0049] in:

[0050] The weight (g) of the tinplate slice that a=adheres to rust before derusting;

[0051] b = weight (g) of tinplate slices after derusting with rust remover, washing with water and drying;

[0052] c = weight of tinplate slices before rusting (g).

[0053] The higher the value of the rust removal rate, the...

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PUM

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Abstract

A rust removing composition is described. The composition, based on the total mass of the composition, comprises: 10 to 20% by mass of an inorganic acid; 1 to 10% by mass of an organic acid; 1 to 8% by mass of a penetrant selected from the group consisting of at least one of C2-C4 short-chain ethers and short-chain alcohols; 2 to 10% by mass of a sulfonic acid and / or sulfonate type anionic surfactant; 0.5 to 10% by mass of a corrosion inhibitor; and a balance of water.

Description

technical field [0001] The present invention relates to rust removing compositions, and in particular, to metal-targeted rust removing compositions useful for cleaning metal devices for medical or commercial use. Background technique [0002] Stainless steel medical devices tend to rust and corrode during use for three main reasons. First, devices are often exposed to organic contaminants such as disinfectants, body secretions, body fluids or blood. Salts and iodides contained in organic pollutants are corrosive and destructive to the chromium layer of the device. In particular, dry organic contamination on the device is more damaging. Second, devices are often subjected to chemical or physical disinfection after use. Chlorine-containing disinfectant solutions, peracetic acid, acidic electrolyzed water, and high-temperature and high-humidity environments can oxidize and corrode the nickel-chromium layer or even the iron in the device. Also, during cleaning of the unit, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C11D1/12C11D3/02C11D3/20C11D3/00C11D11/00C23G1/06
CPCC11D1/143C11D3/2075C11D1/22C11D3/046C11D3/042C11D3/349C23G1/088C11D3/2068C11D11/0029C11D3/30C11D3/2006C11D3/28C23G1/06C11D3/0073C11D2111/16
Inventor 谢颖玮刘颋邱凯
Owner 3M INNOVATIVE PROPERTIES CO
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