CN113122857A

CN113122857A - Corrosion scavenger for ambulances and medical equipment and preparation method and application thereof

Info

Publication number: CN113122857A
Application number: CN202110237769.5A
Authority: CN
Inventors: 卢宜东; 欧阳江林; 陈贤帅
Original assignee: Foshan Angels Biotechnology Co ltd
Current assignee: Foshan Angels Biotechnology Co ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-07-16

Abstract

The invention belongs to the field of metal surface treatment, and discloses a rust scavenger for ambulances and medical equipment, a preparation method and application thereof, wherein the rust scavenger comprises a nonionic surfactant, organic acid, fluoride, a corrosion inhibitor and water, and the rust scavenger is prepared by adjusting the raw material composition of the rust scavenger and reasonably and effectively compounding the raw material composition. The preparation method disclosed by the invention is simple in process, strong in controllability, beneficial to large-scale industrial production and wide in application prospect.

Description

Corrosion scavenger for ambulances and medical equipment and preparation method and application thereof

Technical Field

The invention belongs to the technical field of metal surface treatment, and particularly relates to a rust scavenger for ambulances and medical equipment, and a preparation method and application thereof.

Background

The medical ambulance bears the important mission of saving and helping the patient, has high use frequency, and needs to be disinfected frequently in the use process, but the most vehicle-mounted disinfectant used in hospitals at all levels at present is chlorine-containing disinfectant, however, the chlorine-containing disinfectant has excellent disinfection effect, and the contained chlorine ions can corrode the vehicle body, the interior trim, medical equipment, accessories and the like, so that the structural strength of the equipment, the accessories and the like is influenced, the aesthetic effect of the vehicle body, the interior trim and the like is also greatly influenced, and the clean impression of the public on the medical equipment is influenced. Most of the existing rust scavengers adopt inorganic acidic rust scavengers, so that rust and oxide layers on a vehicle body, parts and medical equipment cannot be effectively removed, and obvious pungent smells such as sour taste and the like can be generated when the rust scavengers are used in a closed narrow space.

Disclosure of Invention

The invention provides a rust scavenger for ambulances and medical equipment, a preparation method and application thereof, which are used for solving one or more technical problems in the prior art and at least provide a beneficial choice or creation condition.

In order to overcome the technical problems, the technical scheme adopted by the invention is as follows:

a rust scavenger for ambulances and medical equipment comprising: nonionic surfactant, organic acid, fluoride, corrosion inhibitor and water.

As a further improvement of the above aspect, the nonionic surfactant includes alkylphenol ethoxylates. Specifically, the alkylphenol polyoxyethylene ether can be OP-10 or TX-10. This type of surfactant has a molecular structure that is composed of two parts, one end of the molecule being a non-polar lipophilic hydrophobic group, sometimes also referred to as a lipophilic group; the other end of the molecule is a hydrophilic group with polarity, sometimes called as oleophobic group or figuratively called as hydrophilic head, two molecular fragments or groups with opposite structures and properties are respectively positioned at two ends of the same molecule and are connected by chemical bonds, so that an asymmetric and polar structure is formed, and the special molecule is endowed with the characteristics of hydrophilicity and lipophilicity, but not overall hydrophilicity or lipophilicity, so that the cleaning effect of the surfactant containing the type is greatly improved when the surfactant is used for cleaning the oil stains of mineral oil, because the mineral oil is mainly a mixture of liquid alkanes with long carbon chains extracted from petroleum crude oil and is difficult to react with acidic substances and alkaline substances, therefore, the surfactant of the type is used, wherein the hydrophilic group can be combined with water, and the lipophilic group is combined with the mineral oil, so that the interfacial tension of particles and a water phase is greatly reduced, therefore, the metal surface can be dissolved in an aqueous cleaning solution, and the metal surface can be cleaned with oil stains and the like. In particular, because there is not only rust in ambulances, medical equipment, accessories and the like, but also much oil stain, the nonionic surfactant is used, so that the oil stain can be effectively removed in the system, and simultaneously the tension of the liquid and the rust surface can be reduced, so that the rust remover can penetrate and spread to the rust surface more quickly, and the dissolution and stripping of the rust are accelerated.

As a further improvement of the above aspect, the organic acid is at least one selected from the group consisting of citric acid, oxalic acid, phytic acid, sulfamic acid, and tetraacetic acid. Preferably, the organic acid is a mixture of sulfamic acid, oxalic acid and phytic acid, and the weight ratio of the organic acid to the phytic acid is (3-5): (2-3): 1-2). The sulfamic acid, the phytic acid and the oxalic acid can ionize hydrogen ions after being dissolved in water, a certain acid value can be provided for a system, the derusting effect is greatly facilitated, in addition, oxalic acid can ionize oxalate ions after being dissolved in water, certain complexing effect is achieved, iron ion dissolution can be accelerated, phytic acid can ionize the phytate ions after being dissolved in water, the ions have high chelating potential energy and excellent corrosion resistance is achieved, and when the ions can clear rust, the surface has certain antirust capacity. And meanwhile, no acidic odor is generated when the organic acid is used in the using process.

As a further improvement of the above aspect, the fluoride is at least one selected from the group consisting of sodium fluoride, potassium fluoride, ammonium fluoride, and ammonium bifluoride. Specifically, fluorine ions are introduced into an acid system, so that the dissolution speed of the rust scavenger on the iron rust can be obviously improved. Further, hydrofluoric acid is generally not selected for the purpose of ensuring the effect and making the use safer, and sodium fluoride or ammonium fluoride is often preferred.

As a further improvement of the above scheme, the corrosion inhibitor is at least one selected from thiourea, benzotriazole, phosphonic carboxylic acid, molybdate, polyaspartic acid or mercaptobenzothiazole. Specifically, molybdate is generally selected, belongs to an anodic oxide film type corrosion inhibitor, can reduce corrosion to normal metal while derusting, avoids hydrogen embrittlement, and can form a layer of antirust film on the surface of the metal after derusting to slow down reoxidation of the metal.

As a further improvement of the above scheme, the rust scavenger comprises, in weight percent: 2-3% of nonionic surfactant, 5-10% of organic acid, 3-10% of fluoride, 3-5% of corrosion inhibitor and 64.5-84.5% of water.

As a further improvement of the scheme, the rust remover further comprises a thickening agent, a solubilizer and essence, wherein the thickening agent is 0.5-2.5 wt%, the solubilizer is 1.5-2.5 wt%, and the essence is 0.5-2.5 wt%.

As a further improvement of the scheme, the thickening agent is a nonionic acidic thickening agent; the solubilizer is selected from alkyl glycoside. Specifically, the nonionic acidic thickening agent is used in the rust removing process to enhance the wall-hanging property of the rust remover, in the normal rust removing process, after the rust remover is sprayed, the rust remover falls along a workpiece to cause too little residual quantity of a medicament on the surface of the workpiece, so that the rust removing speed is reduced, the rust removing is incomplete, and secondary spraying or third spraying is needed. In addition, the alkyl glycoside is selected as the solubilizer mainly for increasing the solubility of the surfactant in the system and avoiding the surfactant from being separated out due to overhigh salt or overlow temperature.

Furthermore, the essence in the invention is water-based essence of daily chemical grade. Most of the existing rust scavengers are strong corrosive chemical products, and consumers are afraid of skin contact, so that psychological fear and the like are easily generated due to strong pungent smell of the strong acidic rust scavengers. The rust remover disclosed by the invention basically has no pungent smell before the essence is added, and the smell of the rust remover in use can be further improved after the essence is added, so that the fear of a user in the heart is reduced, and the pungent smell in use is avoided.

The preparation method of the corrosion scavenger comprises the following steps: weighing raw material components, respectively adding other raw material components into water, simultaneously adding the next material after the last raw material component is added and uniformly stirred in the feeding process, and stirring after all the raw material components are completely added to prepare the corrosion scavenger. Therefore, the caking phenomenon can be effectively avoided, the raw material components are fully dissolved, and the rust removing effect of the obtained rust remover is more stable.

The rust scavenger of any one of the present invention is used in the treatment of metal surfaces, especially in the treatment of metal surfaces of medical ambulances, medical equipment, fittings, etc.

The invention has the beneficial effects that:

the invention provides a rust scavenger for ambulances and medical equipment and a preparation method and application thereof, the rust scavenger is prepared by adjusting the raw material composition of the rust scavenger and reasonably and effectively compounding, the obtained rust scavenger is mild and does not hurt hands, and can quickly and efficiently remove rust, oxide layers and oil stains on equipment and accessories in the medical ambulances to restore the original color of metal or the color close to the original color, no obvious yellow or black rust, no pungent odor is generated in the process of removing the rust, manual polishing of the rust is not needed, the wall-hanging property of the rust scavenger is strong, the spraying frequency can be effectively reduced, and the waste is greatly reduced. The preparation method disclosed by the invention is simple in process, strong in controllability, beneficial to large-scale industrial production and wide in application prospect.

Drawings

FIG. 1 is a graph showing the comparison of the rust remover obtained in example 1 before and after spraying rust removal on a rusted panel of an ambulance;

FIG. 2 is a graph showing the comparison of the rust removing effect of the rust remover obtained in example 2 before and after spraying rust removing agent on the rusty part of a certain part of an ambulance;

FIG. 3 is a comparison graph of rust removal effects of the rust remover obtained in example 2 and comparative example 2 on spraying rust removal on the oil stain and rust mixed part in the ambulance.

Detailed Description

The present invention is specifically described below with reference to examples in order to facilitate understanding of the present invention by those skilled in the art. It should be particularly noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as non-essential improvements and modifications to the invention may occur to those skilled in the art, which fall within the scope of the invention as defined by the appended claims. Meanwhile, the raw materials mentioned below are not specified in detail and are all commercially available products; the process steps or extraction methods not mentioned in detail are all process steps or extraction methods known to the person skilled in the art.

Example 1

A rust scavenger for ambulances and medical equipment, comprising by weight percent: OP-102%, organic acid (prepared by 1:1 weight ratio of sulfamic acid and oxalic acid) 5%, ammonium fluoride 3%, corrosion inhibitor (obtained by mixing 3:1 weight ratio of sodium molybdate and benzotriazole) 3%, nonionic acidic thickener 0.5%, alkyl glycoside 1.5%, daily chemical grade lemon aqueous essence 0.5% and water 84.5%.

A preparation method of a rust scavenger for ambulances and medical equipment comprises the following steps: weighing raw material components according to a formula, adding other raw material components into water at normal temperature, and adding the next material after the former raw material component is added and uniformly stirred in the feeding process to obtain a finished product 1 of the corrosion scavenger in the embodiment.

Example 2

A rust scavenger for ambulances and medical equipment, comprising by weight percent: TX-103%, 8% of organic acid (prepared from citric acid, phytic acid and ethylene diamine tetraacetic acid according to a weight ratio of 5:3: 2), 4% of fluoride (prepared from sodium fluoride and potassium fluoride according to a weight ratio of 1: 1), 4% of corrosion inhibitor (prepared from sodium molybdate and benzotriazole according to a weight ratio of 3: 1), 0.6% of nonionic acidic thickener, 2% of alkyl glycoside, 0.65% of daily-chemical kumquat-flavor aqueous essence and 77.75% of water.

A preparation method of a rust scavenger for ambulances and medical equipment comprises the following steps: weighing raw material components according to a formula, adding other raw material components into water at normal temperature, and adding the next material after the former raw material component is added and uniformly stirred in the feeding process to obtain a finished product 2 of the corrosion scavenger in the embodiment.

Example 3

A rust scavenger for ambulances and medical equipment, comprising by weight percent: TX-103%, organic acid (prepared from citric acid, phytic acid and ethylene diamine tetraacetic acid according to a weight ratio of 3:2: 1) 10%, fluoride (prepared from sodium fluoride and potassium fluoride according to a weight ratio of 1: 1) 10%, corrosion inhibitor (prepared from sodium molybdate and benzotriazole according to a weight ratio of 3: 1) 5%, nonionic acidic thickener 2.5%, alkyl glycoside 2.5%, daily-chemical kumquat-flavor aqueous essence 2.5% and water 64.5%.

A preparation method of a rust scavenger for ambulances and medical equipment comprises the following steps: weighing raw material components according to a formula, adding other raw material components into water at normal temperature, and adding the next material after the former raw material component is added and uniformly stirred in the feeding process to obtain a finished product 3 of the corrosion scavenger in the embodiment.

Comparative example 1

Comparative example 1 is different from example 1 in that comparative example 1 does not contain fluoride, and other raw material components and preparation processes are the same as those of example 1. Rust scavenger comparative example 1 was obtained.

Comparative example 2

Comparative example 2 is different from example 2 in that comparative example 2 does not contain a nonionic surfactant, and other raw material components and preparation processes are the same as those of example 1. Rust scavenger comparative example 2 was obtained.

Comparative example 3

Comparative example 3 is different from example 1 in that comparative example 3 does not contain the nonionic thickener, and other raw material components and preparation processes are the same as those of example 1. Rust scavenger comparative example 3 was obtained.

Product performance testing

1. The finished product of the rust remover in the embodiment 1 is sprayed on a rusted panel of an ambulance, and the comparison effect before and after the spraying is shown in figure 1 (wherein, the left figure is before the spraying for rust removal, and the right figure is after the spraying for rust removal), as can be seen from figure 1, the surface of the panel presents serious rust and oil stains before the spraying for rust removal, after the spraying for rust removal of the rust remover in the embodiment 1, the rust and the oil stains on the surface of the panel are removed completely, and a clean and clean surface is exposed, which shows that the finished product 1 in the embodiment of the rust remover has stronger removing effect on the rust and the oil stains.

2. The finished product of the example 2 is sprayed on the rust position of a certain part of an ambulance, and the comparative effect before and after spraying is shown in figure 2 (wherein, the left figure is before spraying rust removal, and the right figure is after spraying rust removal), as can be seen from figure 2, the part presents serious rust and oil stain before spraying rust removal, after the rust remover of the example 2 is sprayed for rust removal, the rust and the oil stain on the surface are almost completely removed, and a clean and clean surface is exposed, which shows that the finished product 2 of the example of the rust remover has stronger removing effect on the rust and the oil stain.

3. The rust scavenger comparative example finished product 1 and the rust scavenger example finished product 1 are sprayed to the equivalent place of the rust in the ambulance according to the same usage amount, and finally, the two products can clear the rust in the ambulance, but the time for clearing the rust of the two products is different, the rust scavenger example finished product 1 can clear the rust within 5 minutes, the rust scavenger comparative example finished product 1 needs 9 minutes and has 80 percent more time than the time of the example finished product 1, thereby showing that the fluoride can obviously improve the rust removal speed in the rust scavenger of the invention.

4. The rust remover comparative example finished product 2 and the rust remover example finished product 2 are respectively sprayed on the oil stain and rust mixed position in the ambulance, the comparison effect after rust removal of the two is shown in figure 3, (wherein, the left side is the rust removing treatment sprayed on the rust remover example finished product 2, and the right side is the rust remover comparative example finished product 2), the surfaces of the parts treated by the rust remover example finished product 2 are clean without any oil stain and rust residue, the oil stain and the rust on the surfaces of the parts treated by the rust remover comparative example finished product 2 still remain on the surfaces of the parts after a long time treatment, the main reason is probably because the oil stain exists on the surfaces of the parts, the oil stain can prevent the rust remover from contacting with the rust and the parts base materials, so the rust and the oil stain on the parts can not be removed completely after the long time rust removal treatment, in the embodiment of the rust remover, the finished product 2 has a better oil stain removing effect due to the use of the nonionic surfactant, after the oil stain is removed, the rust remover can be in full contact with rust, and the rust can be removed completely, so that the nonionic surfactant is used in the rust remover, and the consideration is that part of rust in the ambulance can be mixed with the oil stain, and if the nonionic surfactant does not contain the component, the oil stain and the rust at the part can not be removed completely.

5. The finished product 3 of the rust remover in the comparative example and the finished product 1 of the rust remover in the example are sprayed on the equivalent part of the rust in the ambulance, the finished product 1 of the rust remover in the example can clean the rust and the oil stain after being sprayed for 2 times, while the finished product 3 of the rust remover in the comparative example needs to be sprayed for 5 times to clean the rust, and the difference between the two is that the finished product 3 of the rust remover in the comparative example contains the nonionic thickening agent, so that the nonionic thickening agent can effectively prolong the residual time of rust removing components in the rust remover on parts, thereby reducing the spraying times, and reducing the consumption and waste of the agent.

It will be obvious to those skilled in the art that many simple derivations or substitutions can be made without inventive effort without departing from the inventive concept. Therefore, simple modifications to the present invention by those skilled in the art according to the present disclosure should be within the scope of the present invention. The above embodiments are preferred embodiments of the present invention, and all similar processes and equivalent variations to those of the present invention should fall within the scope of the present invention.

Claims

1. A rust scavenger, comprising: nonionic surfactant, organic acid, fluoride, corrosion inhibitor and water.

2. The rust scavenger of claim 1, wherein the non-ionic surfactant comprises an alkylphenol ethoxylate.

3. The rust scavenger of claim 1, wherein the organic acid is selected from at least one of citric acid, oxalic acid, phytic acid, sulfamic acid, or tetraacetic acid.

4. The rust scavenger of claim 1, wherein the fluoride is selected from at least one of sodium fluoride, potassium fluoride, ammonium fluoride or ammonium bifluoride.

5. The rust remover according to claim 1, wherein the corrosion inhibitor is selected from at least one of thiourea, benzotriazole, phosphonocarboxylic acid, molybdate, polyaspartic acid or mercaptobenzothiazole.

6. The rust scavenger of claim 1, comprising, in weight percent: 2-3% of nonionic surfactant, 5-10% of organic acid, 3-10% of fluoride, 3-5% of corrosion inhibitor and 64.5-84.5% of water.

7. The rust scavenger according to claim 1 or 6, further comprising 0.5-2.5% by weight of a thickener, 1.5-2.5% by weight of a solubilizer, and 0.5-2.5% by weight of an essence.

8. The rust remover according to claim 7, wherein the thickener is a nonionic acidic thickener; the solubilizer is selected from alkyl glycoside.

9. A method of preparing a rust scavenger according to any one of claims 1 to 8, comprising the steps of: weighing raw material components, respectively adding other raw material components into water, simultaneously adding the next material after the last raw material component is added and uniformly stirred in the feeding process, and stirring after all the raw material components are completely added to prepare the corrosion scavenger.

10. Use of a rust scavenger according to any one of claims 1 to 8 in the treatment of a metal surface.