CN113004789A - Special EFT (ethylene-propylene-diene monomer) anticorrosive paint for high-humidity high-latitude high-altitude water cooler and preparation method thereof - Google Patents

Abstract

An EFT anticorrosive paint special for a high-humidity, high-latitude and high-altitude water cooler and a preparation method thereof relate to an anticorrosive technology of a petroleum refining cooler. The components and parts by weight are as follows: the component A comprises: 20.6 parts of liquid polysiloxane, 20.6 parts of E-12 bisphenol A epoxy resin, 4.8 parts of solid siloxane and methyltrimethoxysilane polymer, 9.5 parts of gamma-propylaminotriethoxysilane, 4.4 parts of methyldiethoxyaminopropylsilane, 4.2 parts of melamine formaldehyde resin, 6.4 parts of xylene and butanol and 2 parts of iota-A molecular sieve; and B component: 8.2 parts of zinc powder, 3.6 parts of iron oxide red powder, 11.4 parts of organic silicon modified polyester polymer, 3.3 parts of lauryl alkylolamide phosphate ester and 1 part of drier. The EFT special anticorrosive paint can be used in various water-phase media, can also be used under the condition that a shell pass contains corrosive media, and has the temperature resistance of 250 ℃. And the performance of the coating is suitable for the conditions of south-north climate, low maintenance time and temperature, low temperature and humidity, large temperature difference, high altitude hypoxia and the like, and the using universality and the construction performance of the coating are greatly improved.

Description

Special EFT (ethylene-propylene-diene monomer) anticorrosive paint for high-humidity high-latitude high-altitude water cooler and preparation method thereof

Technical Field

The invention relates to an anti-corrosion technology of a petroleum refining cooler, in particular to an EFT anti-corrosion coating special for a high-humidity, high-latitude and high-altitude water cooler and a preparation method thereof.

Background

The water cooler for the petroleum refining water cooler is generally made of 10# and 20# carbon steels, the water cooler made of the carbon steels is extremely easy to corrode in an aqueous medium environment, if no anticorrosion measures are taken, the service life of the water cooler for the petroleum refining water cooler is generally about 1-2 years, and the water cooler frequently corrodes and leaks, so that the stable operation of equipment of a refining enterprise can be directly influenced. The indirect loss of unit downtime due to corrosion leakage of the water cooler is typically more than a dozen times the direct loss of the equipment.

The EFT water cooler is divided into a tube side and a shell side, wherein a water phase generally passes through the tube side, and oil or oil gas passes through the shell side. The aqueous side aqueous medium broadly refers to: seawater, circulating water, reclaimed water, refrigerant water, and the like. The shell side medium contains acidic water and acidic substances such as hydrogen sulfide, sulfur dioxide, a small amount of hydrogen chloride, nitride, carbon dioxide and other corrosive media, and both the tube side and the shell side need to be subjected to anticorrosion treatment. However, the common anticorrosive paint can not be used in aqueous medium and corrosive medium, and the heat resistance of the paint can not meet the high temperature resistance requirement.

In addition, the petroleum refining industry in China has wide distribution regions and huge climate differences, such as: the northeast China most refining and chemical enterprise, Daqing petrochemical company, has the room temperature of about ten degrees centigrade in four and five months in a year, and the southeast China Hainan petrochemical company and China Petroleum Guangxi petrochemical company have much rain and wind all the year round and need to be subjected to solar radiation at high latitude; the China Petroleum Sichuan petrochemical industry conflicts with basins, and 55% of the time in one year, no sunlight is seen all the year around in outdoor construction, air circulation is not smooth, and the humidity is high; the medium petroleum Yunnan petrochemical site is in a plateau with the altitude of 3000 meters, the average temperature of about 15 ℃ per year, the temperature difference is small, and the highest temperature generally does not exceed 25 ℃; the inland deep in Xinjiang takes medium petroleum Clarity stone as an example, belongs to a typical continental climate, and the coating is dried all the year round, the temperature difference between day and night is usually up to 20-25 ℃, and the factors can cause slow curing or complete curing within 24 hours. In addition to the increase of the environmental factor difference, in order to avoid the great difference of the overhaul time of the south-north petrochemical enterprises in rainy seasons and the like, the south petrochemical enterprises generally overhaul in 12 months in winter to 1 month in years, the temperature is mostly 10-15 ℃, and the normal temperature curing of the EFT coating is not facilitated. General anticorrosive coatings lack extensive and versatile construction characteristics.

Disclosure of Invention

In order to solve the problems, the invention provides the special EFT anticorrosive paint for the high-humidity, high-latitude and high-altitude water cooler. Another object of the present invention is to provide a process for the preparation of the above-mentioned coating.

The technical scheme adopted by the invention for realizing the purpose is as follows: the special EFT anticorrosive paint for the high-humidity high-latitude high-altitude water cooler is characterized by comprising the following components in parts by weight:

the component A comprises:

the zinc powder and the iron oxide red powder are both 150 meshes.

The preparation method of the special EFT anticorrosive paint for the high-humidity high-latitude high-altitude water cooler is characterized by comprising the following steps of:

and (2) introducing the components except the gamma-propylamine triethoxysilane in the component A into a reaction kettle in the sequence, mixing and stirring uniformly at 82 ℃ for 2 hours until the molecular weight of the product reaches 5700-5900, cooling to below 35 ℃, adding the gamma-propylamine triethoxysilane, heating to 55 ℃, continuing stirring, keeping the temperature and stirring for one hour, cooling to below 30 ℃, discharging, cooling to room temperature, and packaging.

And (3) after uniformly mixing the component B, introducing the mixture into a ball mill, grinding for 1 hour, maintaining the temperature at 35 ℃, and discharging and barreling.

The EFT special anticorrosive paint can be used in various water-phase media, can also be used under the condition that a shell pass contains corrosive media, and has the temperature resistance of 250 ℃. And the performance of the coating is suitable for the conditions of south-north climate, low maintenance time and temperature, low temperature and humidity, large temperature difference, high altitude hypoxia and the like, and the using universality and the construction performance of the coating are greatly improved.

Detailed Description

The invention is further illustrated below with reference to specific examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.

Example 1

The special EFT anticorrosive paint for the high-humidity high-latitude high-altitude water cooler comprises the following components in parts by weight:

the component A comprises:

and B component:

the zinc powder and the iron oxide red powder are both 150 meshes.

Example 2

The preparation method of the special EFT anticorrosive paint for the high-humidity high-latitude high-altitude water cooler in the embodiment 1 comprises the following steps:

and (2) introducing the components except the gamma-propylamine triethoxysilane in the component A into a reaction kettle in the sequence, mixing and stirring uniformly at 82 ℃ for 2 hours until the molecular weight of the product reaches 5700-5900, cooling to below 35 ℃, adding the gamma-propylamine triethoxysilane, heating to 55 ℃, continuing stirring, keeping the temperature and stirring for one hour, cooling to below 30 ℃, discharging, cooling to room temperature, and packaging.

And (3) after uniformly mixing the component B, introducing the mixture into a ball mill, grinding for 1 hour, maintaining the temperature at 35 ℃, and discharging and barreling.

When the paint is used on site, the component A and the component B are mixed and stirred uniformly at normal temperature, cured for 20 minutes, and sprayed or rolled or brushed for use.

The above-described examples are merely illustrative of embodiments of the present invention and do not limit the scope of the present invention.

Claims (3)

1. The special EFT anticorrosive paint for the high-humidity high-latitude high-altitude water cooler is characterized by comprising the following components in parts by weight:

the component A comprises:

and B component:

2. the EFT anticorrosive paint special for high-humidity, high-latitude and high-altitude water coolers as claimed in claim 1, wherein the zinc powder and the iron oxide red powder are 150 meshes.

3. The method for preparing the EFT anticorrosive paint special for the high-humidity high-latitude and high-altitude water cooler according to claim 1, which is characterized by comprising the following steps:

and (2) introducing the components except the gamma-propylamine triethoxysilane in the component A into a reaction kettle in the sequence, mixing and stirring uniformly at 82 ℃ for 2 hours until the molecular weight of the product reaches 5700-5900, cooling to below 35 ℃, adding the gamma-propylamine triethoxysilane, heating to 55 ℃, continuing stirring, keeping the temperature and stirring for one hour, cooling to below 30 ℃, discharging, cooling to room temperature, and packaging.

And (3) after uniformly mixing the component B, introducing the mixture into a ball mill, grinding for 1 hour, maintaining the temperature at 35 ℃, and discharging and barreling.