阅读说明：本技术 一种耐高温烟气腐蚀的防护涂层材料及其制备方法 (Protective coating material resistant to high-temperature flue gas corrosion and preparation method thereof ) 是由 曲鹏 张伟伟 王国芳 于 2020-12-28 设计创作，主要内容包括：本发明属于防护材料技术领域,具体涉及一种耐高温烟气腐蚀的防护涂层材料及其制备方法。本发明公开了一种耐高温烟气腐蚀的防护涂层材料,其原料组分由基料、填料和添加剂三部分组成,所述基料为：含硅属性有机基团的无机-有机互穿网络制成的聚合物；所述填料为：多种组分组成的陶瓷功能填料；所述添加剂为：涂料偶联剂、无机颜料、溶剂、助剂和耐磨增强剂；所述含硅属性有机基团的无机-有机互穿网络制成的聚合物含有羟基；各个所述组分的重量含量为：基料：55％～65％；填料：15％～25％：溶剂：10％～15％；涂料偶联剂：5％～10％；无机颜料、助剂和耐磨增强剂适量。(The invention belongs to the technical field of protective materials, and particularly relates to a high-temperature smoke corrosion resistant protective coating material and a preparation method thereof. The invention discloses a protective coating material resistant to high-temperature smoke corrosion, which comprises three raw material components of a base material, a filler and an additive, wherein the base material comprises the following components: polymers made from inorganic-organic interpenetrating networks containing silicon-attribute organic groups; the filler is as follows: a ceramic functional filler composed of a plurality of components; the additive is as follows: a coating coupling agent, an inorganic pigment, a solvent, an auxiliary agent and an abrasion-resistant reinforcing agent; the polymer prepared by the inorganic-organic interpenetrating network containing the silicon property organic group contains hydroxyl; the weight contents of the components are as follows: base material: 55 to 65 percent; filling: 15% -25%: solvent: 10% -15%; coating coupling agent: 5% -10%; proper amounts of inorganic pigment, auxiliary agent and wear-resisting reinforcing agent.)

1. The protective coating material resistant to high-temperature flue gas corrosion is characterized in that: the raw material components of the composite material comprise three parts of base material, filler and additive,

the base material is as follows: polymers made from inorganic-organic interpenetrating networks containing silicon-attribute organic groups;

the filler is as follows: a ceramic functional filler composed of a plurality of components;

the additive is as follows: a coating coupling agent, an inorganic pigment, a solvent, an auxiliary agent and an abrasion-resistant reinforcing agent;

the polymer prepared by the inorganic-organic interpenetrating network containing the silicon property organic group contains hydroxyl;

the weight contents of the components are as follows:

base material: 55 to 65 percent;

filling: 15% -25%:

solvent: 10% -15%;

coating coupling agent: 5% -10%;

proper amounts of inorganic pigment, auxiliary agent and wear-resisting reinforcing agent.

2. The protective coating material resistant to high-temperature flue gas corrosion according to claim 1, wherein: the polymer prepared by the inorganic-organic interpenetrating network containing the silicon attribute organic group is a multi-block grafted inorganic-organic chelating polymer which is formed by alternately arranging, wherein the polymer is an interpenetrating network polymer mainly containing an inorganic polymer and is used as a film forming substance, the silicon-containing inorganic polymer in a solution is used as a main chain, and the organic polymer modified resin is grafted at a high temperature.

3. The protective coating material resistant to high-temperature flue gas corrosion according to claim 1, wherein: the ceramic functional filler comprises inorganic corrosion-resistant and wear-resistant materials and inorganic ceramic fibers.

4. The protective coating material resistant to high-temperature flue gas corrosion according to claim 3, wherein: the inorganic corrosion-resistant wear-resistant material is composed of one or more of nano boron nitride, silicon micro powder, silicon carbide, fine-crystal alumina, graphite, superfine zinc oxide, titanium oxide and ceramic micro-bead micro powder zirconia.

5. A preparation method of the high-temperature flue gas corrosion resistant protective coating material as claimed in any one of claims 1 to 5, is characterized in that: the method comprises the following steps:

s1: adding a base material into a prepared reaction container;

s2: adding a solvent into the base material, and reducing the rotating speed of 2000-3000 r/min by half for 10 minutes;

s3: adding a filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding a coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding the inorganic pigment, the auxiliary agent and the wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material.

Technical Field

The invention belongs to the technical field of protective materials, and particularly relates to a high-temperature smoke corrosion resistant protective coating material and a preparation method thereof.

Background

The flue gas temperature is about 70-500 ℃, the flue gas temperature of some special working conditions can reach 1000 ℃, the flue gas flow rate is over 5 m/s, the particle size of dust particles is over 0.3 mm, the dust concentration is over 10%, the relative humidity is 3-10%, ash and various corrosive components such as SO2, HCl, NO2, salt mist and the like are contained, even some flue gases contain hydrofluoric acid strong corrosive gas, acid and alkali corrosion exists, and the low-temperature flue gas can also be corroded by condensed water. And in the desulfurization process, the catalyst also has the characteristic of alternating acid and alkali valence, so that the equipment is seriously corroded, and the requirement on anticorrosion conditions is severe.

Therefore, a corrosion protection coating needs to be developed, has the effects of super-strong high-temperature smoke resistance and chimney flue condensed water corrosion resistance, and has the advantages of high temperature resistance, high hardness, high wear resistance, acid and alkali resistance, tar adhesion resistance, good expansion coefficient and long service life of more than 10 years.

Disclosure of Invention

In view of the problems raised by the above background art, the present invention is directed to: is intended to provide.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a protective coating material resisting high-temperature smoke corrosion comprises three parts of base material, filler and additive,

the base material is as follows: polymers made from inorganic-organic interpenetrating networks containing silicon-attribute organic groups;

the filler is as follows: a ceramic functional filler composed of a plurality of components;

the additive is as follows: a coating coupling agent, an inorganic pigment, a solvent, an auxiliary agent and an abrasion-resistant reinforcing agent;

the polymer prepared by the inorganic-organic interpenetrating network containing the silicon property organic group contains hydroxyl;

the weight contents of the components are as follows:

base material: 55 to 65 percent;

filling: 15% -25%:

solvent: 10% -15%;

coating coupling agent: 5% -10%;

proper amounts of inorganic pigment, auxiliary agent and wear-resisting reinforcing agent.

As a preferred scheme of the invention, the polymer prepared by the inorganic-organic interpenetrating network containing the silicon property organic group is an interpenetrating network polymer mainly containing an inorganic polymer as a film-forming substance, the silicon-containing inorganic polymer in the solution is used as a main chain, and the organic polymer modified resin is grafted at high temperature to obtain the multi-block grafted inorganic-organic chelating polymer consisting of alternate arrangement.

In a preferred embodiment of the present invention, the ceramic functional filler comprises an inorganic corrosion-resistant and wear-resistant material and inorganic ceramic fibers.

As a preferable scheme of the invention, the inorganic corrosion-resistant wear-resistant material is composed of one or more of nano boron nitride, silicon micropowder, silicon carbide, fine-crystal alumina, graphite, ultrafine zinc oxide, titanium oxide and ceramic microbead micropowder zirconia.

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding a base material into a prepared reaction container;

s2: adding a solvent into the base material, and reducing the rotating speed of 2000-3000 r/min by half for 10 minutes;

s3: adding a filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding a coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding the inorganic pigment, the auxiliary agent and the wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material.

The invention has the beneficial effects that:

1. long-acting corrosion prevention of the coating: after the organic polymer is modified by the inorganic polymer containing silicon, the coating can obtain a multi-block copolymer which is formed by alternate arrangement, a two-dimensional network structure state is formed in the coating space, a dot labyrinth form is formed, and the superfine ceramic functional filler in the coating forms a compact interface transition layer on the coating, so that the attack of acid and alkali liquor on a matrix is effectively prevented under the common action; the paint has excellent corrosion resistance, can resist various corrosion of acid and alkali, resists corrosion of H2S, chloride ions, sulfur dioxide, sulfur trioxide, hydrogen chloride high-temperature water vapor and other media in flue gas, and prevents condensed water point corrosion, stress corrosion, chemical corrosion, potential corrosion and the like;

2. super strong adhesive force, high linear expansion coefficient: inorganic-organic modified chelating film forming matter, inorganic pigment as filler, chemical bond-hydroxyl contained in the coating composition can form chemical bond combination with metal ions, and can well form covalent chain combination with metal materials with the help of a coating coupling agent, the coating has good binding force with the substrate materials, the adhesive force reaches the first level, the binding force between the coating and the substrate is extremely strong, the coating contains metal oxide nano-material and rare earth oxide ultra-micro powder, and helps the coating to form a compact interface transition layer, so that the comprehensive thermodynamic property of the coating is matched with that of the substrate, and the coating has higher flexibility resistance and thermal expansion resistance, and can resist inevitable vibration in operation of a steel chimney even though the steel chimney is reinforced;

3. high temperature resistance: the base material and the filler of the smoke-resistant anticorrosive protective coating are both composed of high-temperature-resistant inorganic matters, the long-term heat resistance can reach 600 ℃, and the short-time temperature can reach 850 ℃;

4. wear resistance smoothness: the ceramic functional filler composed of multiple components enables the surface of the coating to present low surface energy and ultralow friction coefficient, and can enable tar and the surface to be in a non-wetting state, thereby effectively preventing the adhesion of chimney flue viscous foreign matters. The mutual cooperation of different materials endows the coating with excellent wear resistance, smoothness and corrosion resistance, and can resist the high-speed impact and airflow scouring of flue gas dust;

5. good thermal shock resistance: the smoke temperature is changed all the time, the thermal shock resistance of the coating is high, the coating does not fall off when the smoke temperature is changed, no crack is generated, and the adhesive force is good;

6. the coating has long service life: the coating has long service life and good durability, the damaged coating can be repaired conveniently, and the preparation, coating and coating forming processes have no pollution to the environment.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following embodiments are provided to further illustrate the present invention.

Example 1

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 55 parts of base material into a prepared reaction container;

s2: adding 15 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 22.5 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 5 parts of coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding 1 part of inorganic pigment, 0.5 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 1.

Example 2

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 65 parts of base stock into a prepared reaction vessel;

s2: adding 10 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 17.5 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 5 parts of coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and (3) adding 0.5 part of inorganic pigment, 1 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 2.

Example 3

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 60 parts of base material into a prepared reaction container;

s2: adding 10 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 20 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 7.5 parts of coating coupling agent into the polymer obtained in S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding 1 part of inorganic pigment, 0.5 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 3.

Example 4

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 60 parts of base material into a prepared reaction container;

s2: adding 12.5 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 20 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 5 parts of coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding 1 part of inorganic pigment, 0.5 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 4.

Example 5

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 55 parts of base material into a prepared reaction container;

s2: adding 12.5 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 25 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 5 parts of coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding 1 part of inorganic pigment, 0.5 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 5.

Example 6

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 65 parts of base stock into a prepared reaction vessel;

s2: adding 10 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 15 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 7 parts of coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding 1 part of inorganic pigment, 1 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 6.

Example 7

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 55 parts of base material into a prepared reaction container;

s2: adding 15 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 20 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 7 parts of coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding 1 part of inorganic pigment, 1 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 1.

Example 8

A preparation method of a protective coating material resistant to high-temperature flue gas corrosion is characterized by comprising the following steps: the method comprises the following steps:

s1: adding 55 parts of base material into a prepared reaction container;

s2: adding 15 parts of solvent into the base material, and reducing the speed by half for 10 minutes at 2000-3000 r/min;

s3: adding 17 parts of filler into the polymer obtained in the S2, and dispersing for 20 minutes at a rotating speed of 2000-3000 r/min;

s4: adding 10 parts of coating coupling agent into the polymer obtained in the S3, and dispersing for 60-90 minutes at a rotating speed of 2000-3000 r/min;

s5: and adding 1 part of inorganic pigment, 1 part of auxiliary agent and 1 part of wear-resistant reinforcing agent into the mixed solution obtained in the step S4 according to the needs, and stirring for 10 minutes to obtain the protective coating material 1.

Product parameter testing was performed on examples 1 to 8, yielding the following data:

product performance testing was performed on examples 1-8, yielding the following data:

the invention takes interpenetrating network polymer which takes inorganic polymer as main material as film forming matter, takes inorganic polymer containing silicon in solution as main chain, grafts organic polymer modified resin at high temperature, obtains multi-block grafted inorganic-organic chelating polymer which is composed by alternative arrangement, has good film forming property, good adhesive force, smooth and self-cleaning coating, high temperature resistance, compact film forming and reduced medium loss rate. The main components of the solid raw materials of the coating are inorganic anti-corrosion wear-resistant materials, such as nano boron nitride, silicon micropowder, silicon carbide, fine-crystal alumina, graphite, superfine zinc oxide, titanium oxide, ceramic microspheres, micropowder zirconia and the like, and the materials are prepared into a wear-resistant ceramic functional filler under high-temperature sealing, so that the hardness, the wear resistance, the corrosion resistance, the high-temperature resistance, the impact resistance and the good ductility of the coating are improved; and the inorganic ceramic fiber is used, so that the internal crosslinking strength of the coating is enhanced, and the impact resistance of the coating is enhanced. Proper pigment, solvent, auxiliary agent and added wear-resisting intensifier are also added into the coating; the coating has comprehensive excellent performances of low surface energy, high corrosion resistance, high hardness, large bonding force with a substrate and the like through the interaction of all components and the working principle of synergistic effect.

The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.