阅读说明：本技术 一种铁质工艺品除锈的方法 (Rust removal method for iron artware ) 是由 王刚 王丽 赵春连 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种铁质工艺品除锈的方法,包括如下步骤：第一步、预处理；第二步、配制除锈液：将柠檬酸、表面活性剂、渗透剂、添加剂和去离子水混合均匀,配制成除锈液；第三步、除锈操作：超声辅助除锈操作；第四步、后处理：在除锈完成的工艺品表面涂覆一层全氟聚醚润滑油。经过本发明提供的方法对铁质工艺品表面进行除锈,不仅能够实现高效、高质量去除表面生锈部分,而且不会对工件表面其他部分造成腐蚀和损伤,并在除锈结束后在工件表面涂覆一层全氟聚醚润滑油,能够起到润滑和保护作用,防止二次生锈；本发明的方法易于操作、环保无污染、高质高效,适用于铁质工艺品表面的局部除锈或整体除锈。(The invention discloses a rust removing method for iron artware, which comprises the following steps: firstly, preprocessing; step two, preparing a rust removing liquid: uniformly mixing citric acid, a surfactant, a penetrant, an additive and deionized water to prepare a rust removing liquid; thirdly, rust removal operation: carrying out ultrasonic auxiliary rust removal operation; step four, post-treatment: and coating a layer of perfluoropolyether lubricating oil on the surface of the derusted handicraft. The method provided by the invention can remove rust on the surface of the iron artware, not only can remove the rusty part on the surface with high efficiency and high quality, but also can not corrode and damage other parts on the surface of the workpiece, and a layer of perfluoropolyether lubricating oil is coated on the surface of the workpiece after the rust removal is finished, so that the effects of lubrication and protection can be achieved, and secondary rust can be prevented; the method is easy to operate, environment-friendly, pollution-free, high-quality and efficient, and is suitable for local derusting or integral derusting of the surface of the iron artware.)

1. A method for removing rust on iron artware is characterized by comprising the following steps:

the first step, pretreatment: adding the degreaser into water, stirring uniformly to prepare an eluent, spraying and washing the surface of the iron artware, then cleaning with absolute ethyl alcohol, and drying;

step two, preparing a rust removing liquid: uniformly mixing citric acid, a surfactant, a penetrating agent, an additive and deionized water according to a mass ratio of 10:1:1.2:1.5:30 to prepare a rust removing liquid;

thirdly, rust removal operation: placing the pretreated iron artware into the prepared rust removing liquid, carrying out ultrasonic oscillation for 50-80s at normal temperature, taking out, cleaning with absolute ethyl alcohol, and drying;

step four, post-treatment: and coating a layer of perfluoropolyether lubricating oil on the surface of the derusted handicraft, and drying to complete the derusting process of the iron handicraft.

2. The method for removing rust on iron artware according to claim 1, wherein the oil removing agent is fatty alcohol-polyoxyethylene ether, and the mass fraction of the oil removing agent in the leacheate is 5-6%.

3. The method for removing rust on iron artware according to claim 1, wherein the surfactant is sodium dodecyl benzene sulfonate, and the penetrant is fatty alcohol-polyoxyethylene ether.

4. The method for removing rust on iron artware according to claim 1, wherein the additive is prepared by the following method:

putting the cyclic multi-nitrogen organic amine into a round-bottom flask, slowly dropwise adding a hydrochloric acid solution with the volume fraction of 40% under the condition of uniform stirring at 150r/min at normal temperature, sampling and measuring the pH value in the dropwise adding process, stopping dropwise adding when the pH value is 7, continuously stirring for 2-3h at normal temperature, filtering, washing for more than 3 times by using absolute ethyl alcohol, and drying at normal temperature to obtain the additive.

5. The method for removing rust on a ferrous artwork according to claim 4, wherein the cyclic multi-nitrogen organic amine is imidazole or piperazine.

6. The method for removing rust on iron artware according to claim 1, wherein the perfluoropolyether lubricating oil is applied to a thickness of 8 to 10um in the fourth step.

Technical Field

The invention belongs to the technical field of iron artware development, and particularly relates to a rust removing method for an iron artware.

Background

The iron has excellent processability and metallic luster, the value of the iron is higher and higher along with the development of the society, the manufactured artware is attractive and firm, the appreciation level is improved, the manufactured artware has the characteristics of high glossiness, various varieties, strong fashion sense, long preservation time and the like, can meet the requirements of beautifying modern home and working environment, and can be processed into various animal models, abstract sculptures, red wine placing racks, art lamps and the like; the iron art craft not only can be used as a home decoration ornament, but also can be made into a delicate art gift, and the iron art craft is unique in process, vivid in appearance and deeply loved by people without losing the general style of the iron art craft. However, while the iron artware provides high appreciation value, the iron which is the main component of the iron artware is easy to be oxidized, so that iron rust is formed on the surface of the artware, and particularly, the oxidation speed of the iron artware is accelerated in a high-temperature and high-humidity environment, so that the attractiveness and the service life of the artware are seriously reduced.

The rusted iron artware is directly discarded, so that the waste of resources and living cost is caused; the rust removal of the iron artware by polishing or acid corrosion method can cause the gloss difference of other parts, the range of the corroded part is enlarged, the appreciation of the artware is reduced, the oxidation resistance of the artware is weakened after the surface film of the artware is removed, and the rust removal speed is accelerated.

Disclosure of Invention

The invention aims to provide a rust removing method for an iron artware, which comprises the steps of pretreatment, rust removing liquid preparation, rust removing operation, post-treatment and the like, wherein the rust removing method for the surface of the iron artware can remove a rusted part on the surface with high efficiency and high quality without corroding and damaging other parts on the surface of a workpiece, and a layer of perfluoropolyether lubricating oil is coated on the surface of the workpiece after the rust removing is finished, so that the lubricating and protecting effects can be achieved, and secondary rusting is prevented; the method is easy to operate, environment-friendly, pollution-free, high-quality and efficient, and is suitable for local derusting or integral derusting of the surface of the iron artware.

The purpose of the invention can be realized by the following technical scheme:

a method for removing rust on iron artware comprises the following steps:

the first step, pretreatment: adding the degreaser into water, stirring uniformly to prepare an eluent, spraying and washing the surface of the iron artware, then cleaning with absolute ethyl alcohol, and drying;

step two, preparing a rust removing liquid: uniformly mixing citric acid, a surfactant, a penetrating agent, an additive and deionized water according to a mass ratio of 10:1:1.2:1.5:30 to prepare a rust removing liquid;

thirdly, rust removal operation: placing the pretreated iron artware into the prepared rust removing liquid, carrying out ultrasonic oscillation for 50-80s at normal temperature, taking out, cleaning with absolute ethyl alcohol, and drying;

step four, post-treatment: and coating a layer of perfluoropolyether lubricating oil on the surface of the derusted handicraft, and drying to complete the derusting process of the iron handicraft.

Further, the degreasing agent is fatty alcohol-polyoxyethylene ether, and the mass fraction of the degreasing agent in the leacheate is 5-6%.

Further, the surfactant is sodium dodecyl benzene sulfonate, and the penetrating agent is fatty alcohol-polyoxyethylene ether.

Further, the additive is prepared by the following method:

putting the cyclic multi-nitrogen organic amine into a round-bottom flask, slowly dropwise adding a hydrochloric acid solution with the volume fraction of 40% under the condition of uniform stirring at 150r/min at normal temperature, sampling and measuring the pH value in the dropwise adding process, stopping dropwise adding when the pH value is 7, continuously stirring for 2-3h at normal temperature, filtering, washing for more than 3 times by using absolute ethyl alcohol, and drying at normal temperature to obtain the additive.

Further, the cyclic multi-nitrogen organic amine is imidazole or piperazine.

Further, the coating thickness of the perfluoropolyether lubricating oil in the fourth step is 8-10 um.

The invention has the beneficial effects that:

the rust removing liquid adopts citric acid as a rust removing active component, is supplemented with a surfactant, a penetrating agent and an additive, and is environment-friendly, so that the rust removing liquid meets the environment-friendly requirement; the surface active agent is sodium dodecyl benzene sulfonate, and the surface tension between the workpiece and the rust remover interface is reduced through the actions of wetting, permeating, dispersing, emulsifying, solubilizing and the like, so that the wetting degree of the rust remover on the workpiece surface is improved, and the rust removing speed is accelerated;the penetrant is fatty alcohol-polyoxyethylene ether, and can drive the rust remover to quickly permeate into rusted oxide scale to accelerate the separation of the rusted layer; the additive is a buffer type hydrochloride additive, and after the additive is prepared into the rust removing liquid, a buffer mechanism is formed, and the buffer mechanism can maintain H in the rust removing liquid⁺At a low level and constant over a long period of time, low concentration of H⁺Reacting with oxide on the surface of metal to accelerate the rust removal rate; in addition, at a lower temperature, the pH value of the rust removing liquid cannot be obviously reduced by adding the hydrochloride buffer solution, so that the pH value of the rust removing liquid is kept about 7, and the damage and corrosion of strong acid to the artware body are avoided; the components in the antirust liquid are matched with each other, so that the antirust liquid has the advantages of high rust removal efficiency, good rust removal effect, small corrosion damage to the surface of an artwork and the like;

the method provided by the invention can remove rust on the surface of the iron artware, not only can remove the rusty part on the surface with high efficiency and high quality, but also can not corrode and damage other parts on the surface of the workpiece, and a layer of perfluoropolyether lubricating oil is coated on the surface of the workpiece after the rust removal is finished, so that the effects of lubrication and protection can be achieved, and secondary rust can be prevented; the method is easy to operate, environment-friendly, pollution-free, high-quality and efficient, and is suitable for local derusting or integral derusting of the surface of the iron artware.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A method for removing rust on iron artware comprises the following steps:

the first step, pretreatment: adding the degreaser into water, stirring uniformly to prepare an eluent (the degreaser is fatty alcohol-polyoxyethylene ether, and the mass fraction of the degreaser in the eluent is 5-6%), spraying and washing the surface of the iron artware, cleaning with absolute ethyl alcohol, and drying;

through pretreatment, impurities such as grease, dust and the like on the surface of the iron artware can be removed;

step two, preparing a rust removing liquid: uniformly mixing citric acid, a surfactant (sodium dodecyl benzene sulfonate), a penetrating agent (fatty alcohol-polyoxyethylene ether), an additive and deionized water according to a mass ratio of 10:1:1.2:1.5:30 to prepare a derusting solution;

the surfactant is sodium dodecyl benzene sulfonate, and through the effects of wetting, permeating, dispersing, emulsifying, solubilizing and the like, the surface tension between the workpiece and the surface of the rust remover is reduced, the wetting degree of the rust remover on the surface of the workpiece is improved, and the rust removing speed is accelerated;

the penetrant is fatty alcohol-polyoxyethylene ether, and can drive the rust remover to quickly permeate into rusted oxide scale to accelerate the separation of the rusted layer;

thirdly, rust removal operation: placing the pretreated iron artware into the prepared rust removing liquid, carrying out ultrasonic oscillation for 50-80s at normal temperature, taking out, cleaning with absolute ethyl alcohol, and drying;

in the rust removing process, ultrasonic vibration is adopted, on one hand, the cavitation effect generated in the cleaning medium by ultrasonic is used for impacting and destroying the adsorption of the rust layer on the metal surface, and the falling-off of the rust layer is accelerated; on the other hand, the flow of the rust removing liquid is accelerated by means of the vibration stirring effect of ultrasonic cleaning, so that a loosened rust layer to be fallen off is separated from the metal surface in time, the acid washing liquid which participates in the reaction and loses effectiveness is separated in time, the acid washing liquid which does not participate in the reaction is supplemented to the surface of the workpiece in time, and the chemical reaction of rusting the surface of the workpiece is ensured to be normally carried out;

step four, post-treatment: coating a layer of perfluoropolyether lubricating oil on the surface of the derusted artware, wherein the coating thickness is 8-10um, so that the effects of lubrication and protection are achieved, secondary rusting is prevented, and the derusting process of the iron artware is completed by drying;

wherein, the additive is prepared by the following method:

putting cyclic multi-nitrogen organic amine into a round-bottom flask, slowly dropwise adding a hydrochloric acid solution with the volume fraction of 40% under the condition of uniform stirring at 150r/min at normal temperature, sampling and measuring the pH value of the solution in the dropwise adding process, stopping dropwise adding when the pH value is 7, continuously stirring for 2-3h at normal temperature, filtering, washing for more than 3 times by using absolute ethyl alcohol, and drying at normal temperature to obtain an additive;

wherein, the cyclic multi-nitrogen organic amine is imidazole or piperazine;

a weak covalent bond is formed between organic amine and hydrogen chloride to obtain a buffer type hydrochloride additive, and after the buffer type hydrochloride additive is prepared into the rust removing liquid, a buffer mechanism is formed, and the buffer mechanism can maintain H in the rust removing liquid⁺At a low level and constant over a long period of time, low concentration of H⁺Reacting with oxide on the surface of metal to accelerate the rust removal rate; and at a lower temperature, the pH value of the rust removing liquid cannot be obviously reduced by adding the hydrochloride buffer solution, so that the pH value of the rust removing liquid is kept about 7, and the damage and corrosion of strong acid to the artware body are avoided.