High-thermal-conductivity anticorrosive paint for heat exchanger tube bundle as well as preparation and use methods of high-thermal-conductivity anticorrosive paint

Abstract

The invention discloses a high-thermal-conductivity anticorrosive coating for a heat exchanger tube bundle. The high-thermal-conductivity anticorrosive coating comprises the following components: 40-60 parts of high-temperature curable epoxy modified organic silicon resin, 10-30 parts of a thermal conductive filler, 1-2 parts of a cross-linking agent, 0.2-1 part of a defoaming leveling agent and 15-30 parts of a solvent. The prepared anticorrosive paint has the characteristics of high temperature resistance, high heat conductivity, corrosion resistance and good scale inhibition performance, can prevent the heat exchanger from generating the problems of corrosion perforation, scaling blockage and the like in the high-temperature service process on the premise of ensuring the heat exchange efficiency of the heat exchanger, and provides a good protection effect for the heat exchanger.

Description

technical field

[0001] The invention relates to the technical field of multifunctional protective materials, in particular to a high thermal conductivity anti-corrosion coating for heat exchanger tube bundles and a preparation and use method thereof. Background technique

[0002] Various types of heat exchangers are widely used in modern petrochemical, chlor-alkali, chemical fiber, pharmaceutical and chemical fertilizer production, especially in refineries, which can account for 40% of the total weight of process equipment and more than 20% of investment. The heat exchangers are mainly made of carbon steel, and some are also made of special materials such as stainless steel, copper, titanium and graphite. The corrosion of the heat exchanger is more severe than that of other equipment, because the process medium below 150 ℃ in chemical production basically adopts the water circulation cooling method. Corrosive ion Cl accumulated on the heat transfer surface of the - , SO4 ...

Examples

preparation example Construction

[0055] The invention also provides a preparation method of a high thermal conductivity anti-corrosion coating for heat exchanger tube bundles, comprising the following steps:

[0056] Prepare the components in the stated portions;

[0057] Mixing the nano-aluminum nitride powder and the xylene to obtain an aluminum nitride solution;

[0058] Mix the methylphenylsiloxane resin, the silane coupling agent, and the leveling agent with the model BYK3230 with the aluminum nitride solution, stir evenly, and then age at room temperature to prepare the High thermal conductivity anti-corrosion coating for heat exchanger tube bundles.

[0059] After mixing the nano aluminum nitride powder and the xylene, ultrasonically disperse for 30-60min. And, it needs to be aged at room temperature for 20min.

[0060] The preparation method has the following technical effects:

[0061] The preparation method is simple to operate, easy to implement, and has good controllability, which is favorable...

Embodiment 1

[0071] Mix 10 parts of nano aluminum nitride powder and 15 parts of xylene, and ultrasonically disperse for 30min to obtain an aluminum nitride solution;

[0072] Mix 1 part of KH550 silane coupling agent, 0.2 part of BYK3230 anti-foaming leveling agent and aluminum nitride solution, and stir evenly at high speed;

[0073] Add 40 parts of methylphenylsiloxane resin, stir evenly at high speed, and then age at room temperature for 20 minutes to obtain the high thermal conductivity and high temperature resistant anti-corrosion coating;

[0074] The coating is applied twice, and after each coating is completed, it is placed in an environment of 120°C for high-temperature curing. During the curing process, the temperature is controlled to ensure that there will be no sudden cooling and sudden heating.

Embodiment 2

[0076] Mix 20 parts of nano aluminum nitride powder and 20 parts of xylene, and ultrasonically disperse for 30 minutes to obtain an aluminum nitride solution;

[0077] Mix 1.5 parts of KH550 silane coupling agent, 0.5 part of BYK3230 antifoaming and leveling agent with aluminum nitride solution, and stir evenly at high speed;

[0078] Add 50 parts of methylphenylsiloxane resin, stir evenly at high speed, and then age at room temperature for 20 minutes to obtain the high thermal conductivity and high temperature resistant anti-corrosion coating;

[0079] The coating is applied twice, and after each coating is completed, it is placed in an environment of 150 °C for high temperature curing. During the curing process, the temperature is controlled to ensure that it will not experience sudden cooling and sudden heating.

technical field

[0001] The invention relates to the technical field of multifunctional protective materials, in particular to a high thermal conductivity anti-corrosion coating for heat exchanger tube bundles and a preparation and use method thereof. Background technique

[0002] Various types of heat exchangers are widely used in modern petrochemical, chlor-alkali, chemical fiber, pharmaceutical and chemical fertilizer production, especially in refineries, which can account for 40% of the total weight of process equipment and more than 20% of investment. The heat exchangers are mainly made of carbon steel, and some are also made of special materials such as stainless steel, copper, titanium and graphite. The corrosion of the heat exchanger is more severe than that of other equipment, because the process medium below 150 ℃ in chemical production basically adopts the water circulation cooling method. Corrosive ion Cl accumulated on the heat transfer surface of the - , SO4 ...

Examples

preparation example Construction

[0055] The invention also provides a preparation method of a high thermal conductivity anti-corrosion coating for heat exchanger tube bundles, comprising the following steps:

[0056] Prepare the components in the stated portions;

[0057] Mixing the nano-aluminum nitride powder and the xylene to obtain an aluminum nitride solution;

[0058] Mix the methylphenylsiloxane resin, the silane coupling agent, and the leveling agent with the model BYK3230 with the aluminum nitride solution, stir evenly, and then age at room temperature to prepare the High thermal conductivity anti-corrosion coating for heat exchanger tube bundles.

[0059] After mixing the nano aluminum nitride powder and the xylene, ultrasonically disperse for 30-60min. And, it needs to be aged at room temperature for 20min.

[0060] The preparation method has the following technical effects:

[0061] The preparation method is simple to operate, easy to implement, and has good controllability, which is favorable...

Embodiment 1

[0071] Mix 10 parts of nano aluminum nitride powder and 15 parts of xylene, and ultrasonically disperse for 30min to obtain an aluminum nitride solution;

[0072] Mix 1 part of KH550 silane coupling agent, 0.2 part of BYK3230 anti-foaming leveling agent and aluminum nitride solution, and stir evenly at high speed;

[0073] Add 40 parts of methylphenylsiloxane resin, stir evenly at high speed, and then age at room temperature for 20 minutes to obtain the high thermal conductivity and high temperature resistant anti-corrosion coating;

[0074] The coating is applied twice, and after each coating is completed, it is placed in an environment of 120°C for high-temperature curing. During the curing process, the temperature is controlled to ensure that there will be no sudden cooling and sudden heating.

Embodiment 2

[0076] Mix 20 parts of nano aluminum nitride powder and 20 parts of xylene, and ultrasonically disperse for 30 minutes to obtain an aluminum nitride solution;

[0077] Mix 1.5 parts of KH550 silane coupling agent, 0.5 part of BYK3230 antifoaming and leveling agent with aluminum nitride solution, and stir evenly at high speed;

[0078] Add 50 parts of methylphenylsiloxane resin, stir evenly at high speed, and then age at room temperature for 20 minutes to obtain the high thermal conductivity and high temperature resistant anti-corrosion coating;

[0079] The coating is applied twice, and after each coating is completed, it is placed in an environment of 150 °C for high temperature curing. During the curing process, the temperature is controlled to ensure that it will not experience sudden cooling and sudden heating.

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