A temperature-resistant long-term anti-corrosion coating for ship sewage tank

A long-term anti-corrosion and sewage technology, which is applied in the field of paint manufacturing in the chemical industry, can solve the problems of high construction cost, low paint retention rate, and many times of painting, and achieve the effect of convenient construction and improved water resistance.

Active Publication Date: 2019-02-01
MARINE CHEM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The anti-corrosion coatings used in domestic ship sewage tanks are mainly solvent-based epoxy coatings, such as H84, HJ and other series of solvent-based epoxy coatings, which have been applied in ship sewage tanks and oil-water tanks, etc., but these coating products exist: (1) The number of coating times is high, and the construction cost is high; (2) the paint retention rate is low on the protrusions, edges and welds; (3) the solvent is volatile and toxic, and it is easy to cause fire hazards, etc., which is difficult to meet the requirements of today's ship sewage Protection Requirements for Tank Construction
Since the 1990s, people have used solvent-free epoxy coatings in sewage tanks, but after long-term immersion in oily sewage and frequent alternating heating and cooling, solvent-free epoxy coatings cannot meet the requirements of long-term use.

Method used

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  • A temperature-resistant long-term anti-corrosion coating for ship sewage tank
  • A temperature-resistant long-term anti-corrosion coating for ship sewage tank
  • A temperature-resistant long-term anti-corrosion coating for ship sewage tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put 35 parts by weight of novolac epoxy resin and 15 parts by weight of active modifier RDGE into a stainless steel tank and stir with a high-speed mixer, while stirring, add 2 parts by weight of defoamer (AFCONA2723, 2020), wetting and dispersing agent (BYK-2151 ) 1.5 parts by weight, leveling agent (AFCONA3700) 1.5 parts by weight, after stirring evenly with the resin, add 10 parts by weight of titanium dioxide, iron phosphorus powder 10, zinc phosphate 8, aluminum tripolyphosphate 12 parts by weight, further stir evenly, and then use Grind with a sand mill or a three-roll mill to a standard fineness of less than 60um, filter and fill into a barrel to become component A of the coating.

[0030] The modified alicyclic amine adopts American company Amicure PACM, 21 parts by weight, and the phenalkamine adopts Cardolite 3060, 7 parts by weight, and is configured as 28 parts by weight of a composite modified amine curing agent, which is put into a stainless steel tank and ...

Embodiment 2

[0034] Put 45 parts by weight of novolac epoxy resin and 10 parts by weight of active modifier RDGE into a stainless steel tank and stir with a high-speed mixer, add 1.2 parts by weight of defoamer (Deqian 6800), 0.8 parts by weight of wetting and dispersing agent (Afcona5065) 1.0 parts by weight of leveling agent (AFCONA3700), stir evenly with resin and add 8 parts by weight of titanium dioxide, 12 parts by weight of talcum powder, 14 parts by weight of aluminum tripolyphosphate, 7.7 parts by weight of zinc phosphate, 0.3 parts by weight of graphene, Stir evenly, and then use a sand mill or a three-roll mill to grind to a standard fineness of less than 60um, filter and pack into paint A component.

[0035]The modified alicyclic amine adopts Amicure PACM from American company, 24 parts by weight, and the phenalkamine uses 8 parts by weight of Cardolite 3060, and configures 32 parts by weight of composite modified amine curing agent, and the curing accelerator DMP-302 parts by w...

Embodiment 3

[0038] It is used in the sewage tank of a cargo ship in Ningbo Shipyard, Zhejiang. The sewage in the cabin is a mixture of diesel oil, engine oil and domestic sewage. The original protective coating rusted after 3 months of use. Using the coating prepared in Example 2, grind the surface of the sewage tank to St2 level during construction, mix the A and B components according to the weight ratio of A:B=3:1, stir evenly, and spray with high-pressure airless equipment 2 coats, the first spraying in the morning and the second spraying after the surface is dry in the afternoon, the spraying construction is completed in one day, and the coating is cured at room temperature (25°C) for seven days before use. The obtained coating is smooth and bright. After being soaked in sewage and used for 6 months, it is found that the coating is intact and there is no rust phenomenon, which meets the needs of users.

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Abstract

The invention provides a temperature-resisting long-lasting anticorrosive coating for a sewage tank of a ship. The temperature-resisting long-lasting anticorrosive coating is prepared from a component A and a component B, wherein the component A is prepared from novolac epoxy resin, an active modifier, pigment filler and an assistant; the component B is prepared from a compound type modified amine hardener and a curing accelerator. According to the coating, a solvent is not added in a formula; the coating is cured at normal temperature; a production and construction process meets the environment-friendly requirement; a formed coating reaches a super long-acting anticorrosive effect by accelerated salt spray test verification in a laboratory. The coating can be applied to the sewage tanks of the ship, as well as corrosion prevention of inner walls of sewage pools and sewage storage tanks of power plants and chemical plants.

Description

technical field [0001] The invention relates to the manufacture of coatings in the field of chemical industry, in particular to a manufacturing method and construction method of a solvent-free temperature-resistant long-term anti-corrosion coating applied to sewage tanks of ships. Background technique [0002] The anti-corrosion coatings used in domestic ship sewage tanks are mainly solvent-based epoxy coatings, such as H84, HJ and other series of solvent-based epoxy coatings, which have been applied in ship sewage tanks and oil-water tanks, etc., but these coating products exist: (1) The number of coating times is high, and the construction cost is high; (2) the paint retention rate is low on the protrusions, edges and welds; (3) the solvent is volatile and toxic, and it is easy to cause fire hazards, etc., which is difficult to meet the requirements of today's ship sewage Protection requirements for cabin construction. Since the 1990s, people have used solvent-free epoxy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/61C09D7/63C09D7/65C09D5/08C08G59/50C08G59/56
CPCC08G59/5026C08G59/56C08L2201/08C08L2205/025C09D5/084C09D7/61C09D7/63C09D7/65C09D163/00C08L63/00C08K13/02C08K2003/2241C08K3/34C08K2003/328C08K2003/327C08K3/04
Inventor 郭常青石勇姚国相方倩杨凯张善贵蒋建明关迎东
Owner MARINE CHEM RES INST CO LTD
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