Novel derusting material

Abstract

The invention relates to a novel derusting material and a composition containing the same. The derusting material has a chemical formula as shown in a formula I; the composition consists of the following components: 10-20 parts of a compound shown in formula I, 1-8 parts of a penetrating agent, 2-10 parts of a surfactant, 0.5-5 parts of corrosion inhibitor and the balance of water to 100 parts by weight.

Description

technical field [0001] This 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] Ferrous metal (steel) is prone to rust when placed outdoors or in the open air, which not only affects the appearance quality, but also affects the normal progress of painting, bonding and other processes. Economic losses. Stainless steel medical devices in some special fields such as medical or commercial use tend to rust and corrode during use, mainly for the following three 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 ...

AI Technical Summary

Problems solved by technology

The current commercially available liquid rust removers have the main disadvantage of unsatisfactory rust removal effect, and in the case of long-term use, they will corrode the metal, and the latter will instead cause more serious secondary rust and corrosion or even cause the device to be completely damaged. can not be used

[0003] Traditional chemical rust removal usually uses strong acid, which can chemically react with rust and metal oxides to generate soluble salts, so as to achieve the purpose of rust removal. At the same time of rust removal, acid can react with base metal to release hydrogen, hydrogen It can generate pressure on rust and insoluble scale, which is beneficial to their peeling and reduction of high-valent iron, and accelerates the pickling process, but the traditional acid treatment method also has obvious defects: that is, the large amount of hydrogen gas in the process The occurrence of hydrogen embrittlement will cause the steel to have hydrogen embrittlement, which will cause the mechanical properties of the metal to decline and affect the strength of the steel itself; at the same time, it is easy to form acid mist, which will affect the health of the operator and corrode the surrounding equipment and environment; the consumption of acid is also large. Increases disposal costs; these acids can over-corrode steel

In addition, the residues produced in large quantities need to be discharged frequently, which not only seriously corrodes industrial pipelines, but also pollutes the soil and the environment.

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