A high viscosity anti-corrosion tape for marine steel facilities

Abstract

The present invention belongs to the field of anti-corrosion tape, specifically a high-viscosity anti-corrosion tape for marine steel facilities. The high-viscosity anti-corrosion tape is obtained by dipping a non-woven fabric into an anti-corrosion paste at 120-150°C; the anti-corrosion paste is calculated by weight percentage: 20-30% high-viscosity modified mineral fat, 5-10% mineral fat, 10%-25% mineral oil, 5-10% thickener, 10-20% lubricant, 20-35% composite curing agent, and 1-5% rust inhibitor. The present invention adopts high-viscosity modified mineral fat, which is compounded with mineral oil into a compound, greatly increasing the grip and adhesion of the anti-corrosion tape on the material matrix, enhancing the strictness and sealing effect of the coating, thereby hindering the external corrosive factors from entering the matrix, effectively avoiding matrix corrosion, and enhancing the protective effect.

Description

Technical Field

[0001] The invention belongs to the field of anti-corrosion belts, in particular to a high-viscosity anti-corrosion belt for marine steel facilities. Background Art

[0002] According to ISO classification, the marine environment is the most harsh natural environment for corrosion. Among the five corrosion zones of the marine environment, namely the marine atmosphere zone, the splash zone, the seawater tidal zone, the seawater full immersion zone, and the seabed mud zone, the corrosion in the splash zone is the most serious and is the shortcoming of marine corrosion protection. Therefore, corrosion protection of steel buildings in the splash zone is particularly important and is the focus of marine corrosion protection. Traditional paint protection is very easy to fail under long-term exposure and wave impact, and cathodic protection technology is not suitable for steel column protection in the splash zone; mineral fat protection technology is currently the most recognized protection technology suitable for the splash zone.

[0003] However, the anti-corrosion tapes currently on the market are difficult to resist the erosion of seawater. There are problems such as the anti-corrosion tapes not adhering firmly to the surface of metal materials, causing gaps between the anti-corrosion tapes and the metal, and poor protection, which causes the outer layer of seawater to penetrate into the anti-corrosion tapes and corrode the metal. The weak adhesion between the anti-corrosion tapes and the metal is the root cause of the problem. Therefore, it is of great practical significance to improve the adhesion of the anti-corrosion tapes and develop high-viscosity anti-corrosion tapes for marine environments that are suitable for marine environments and can adhere firmly to metal surfaces. Summary of the invention

[0004] In view of the problem of protecting steel structures in highly corrosive ocean splash zones, the present invention aims to provide a high-viscosity anti-corrosion belt for marine steel facilities and its preparation.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A high-viscosity anti-corrosion tape for marine steel facilities, wherein the high-viscosity anti-corrosion tape is obtained by dipping a non-woven fabric into an anti-corrosion paste at 120-150° C.;

[0007] The anti-corrosion paste comprises, by weight percentage: 20-30% of high-viscosity modified mineral fat, 5-10% of mineral fat, 10%-32% of mineral oil, 5-10% of thickener, 10-20% of lubricant, 20-40% of composite curing agent, and 1-5% of rust inhibitor.

[0008] The high-viscosity modified mineral fat is a mixture of lanolin barium soap, petroleum barium soap and lanolin, and the mass ratio thereof is 2:2:3-2:2:2.

[0009] The mineral fat is one or more of vaseline, lithium-based fat and soap-based fat;

[0010] The mineral oil is one or more of diesel, engine oil, transformer oil or Taiko oil;

[0011] The lubricant is microcrystalline wax or liquid paraffin;

[0012] The composite curing agent is one or more of organic bentonite, mineral mica, talcum powder or micaceous iron ash;

[0013] The thickener is epoxy resin or polyisobutylene;

[0014] The rust inhibitor is one or more of tannic acid, aminosulfonic acid, tannic acid or sodium benzoate.

[0015] The preparation method of the anti-corrosion paste is as follows: high-viscosity modified mineral fat, mineral fat, mineral oil, thickener and lubricant are added into a reaction kettle according to the proportion, heated to 100-120° C. in an air atmosphere, stirred for 0.5-2 hours, then a composite curing agent and a rust inhibitor are added, the temperature is raised to 120-150° C., stirred for 2 hours, and the anti-corrosion paste is obtained.

[0016] The preparation method of the high-viscosity modified mineral fat is as follows: adding lanolin barium soap, petroleum barium soap and lanolin into a reaction kettle according to the proportion, heating to 100-120° C., stirring for 0.5-2 hours, and obtaining the high-viscosity modified mineral fat.

[0017] The method for preparing the high-viscosity anti-corrosion tape for marine steel facilities comprises: dipping the non-woven fabric in the anti-corrosion paste at 120-150° C. for 0.5-2 hours, so that the non-woven fabric is completely immersed in the anti-corrosion paste, and taking out and wringing out the obtained marine steel facility anti-corrosion tape, wherein the density of the anti-corrosion tape is 700-1750 g / m 2 .

[0018] The nonwoven fabric has a thickness of 1.1±0.1 mm.

[0019] The beneficial effects of the present invention are:

[0020] The present invention uses high-viscosity modified mineral fat and mineral oil to form a compound, which greatly increases the grip and adhesion of the anti-corrosion tape on the material matrix, enhances the tightness and sealing effect of the coating, thereby preventing external corrosive factors from entering the matrix, effectively avoiding corrosion of the matrix, and enhancing the protective effect. Specifically:

[0021] (1) The high-viscosity anti-corrosion tape of the present invention can be constructed underwater and can be completely adhered to the metal surface to form a sealing layer on the metal surface. It has good protection, density and stability for steel structures in underwater or humid environments such as rivers, lakes and oceans.

[0022] (2) The present invention greatly enhances the flexibility and toughness of the anti-corrosion belt by compounding high-viscosity modified mineral fat with lubricating oil and other substances, so that the anti-corrosion belt fits well on the surface of the substrate without any gaps.

[0023] (3) The present invention adds high-viscosity modified mineral fat, which greatly enhances the viscosity of the anti-corrosion tape, making it sealed and bonded, thereby enhancing the anti-corrosion effect.

[0024] (4) The present invention uses high-viscosity modified mineral fat and mineral fat as a matrix, adds a lubricant, a composite curing agent and a rust inhibitor, so as to form a soft anti-corrosion belt with high viscosity and high efficiency anti-corrosion performance. This anti-corrosion belt can softly fit the metal surface and tightly adhere to the metal surface to form a sealing layer, effectively avoiding the erosion of external corrosion factors. DETAILED DESCRIPTION

[0025] The present invention is further described below through specific examples, which are helpful for those skilled in the art to more fully understand the present invention, but are not intended to limit the present invention in any way.

[0026] Example 1

[0027] Preparation of high viscosity modified mineral fat

[0028] A mixture of lanolin barium soap, petroleum barium soap and lanolin was added into a reaction kettle according to different proportions in Table 1, heated to 120 degrees Celsius, and stirred evenly to obtain a high-viscosity modified mineral fat; see Table 1 for details.

[0029] Table 1 Preparation Example of High Viscosity Modified Mineral Fat

[0030]

[0031] As can be seen from Table 1, lanolin barium soap, petroleum barium soap and lanolin components complement each other. When the lanolin barium soap content is too low, the prepared high-viscosity modified mineral fat has insufficient viscosity and it is difficult to increase the viscosity of the anti-corrosion tape. When the lanolin or petroleum barium soap content is insufficient, it is difficult to obtain a soft paste. Only under the appropriate ratio of the present invention can a soft, high-viscosity dark brown paste be prepared.

[0032] Example 2

[0033] Preparation of high viscosity anti-corrosion tape

[0034] Preparation of anti-corrosion paste: high viscosity modified mineral fat, mineral fat, mineral oil, thickener and lubricant are added into a reaction kettle according to different proportions in Table 2, heated to 120°C in air atmosphere, stirred for 2 hours, then added with composite curing agent and rust inhibitor, heated to 140°C, stirred for 2 hours, and obtained anti-corrosion paste;

[0035] The high viscosity modified mineral fat is the high viscosity modified mineral fat 5 in Example 1, the mineral fat is silicone grease, the mineral oil is Taiko oil, the thickener is epoxy resin, the lubricant is liquid paraffin, the composite curing agent is talcum powder, and the rust inhibitor is tannic acid.

[0036] The specific component contents are shown in Table 2.

[0037] Table 2

[0038]

[0039] Preparation of high-viscosity anti-corrosion tape: Non-woven fabrics (thickness of non-woven fabrics is 1.08 mm, 1.09 mm, and 1.07 mm, respectively) were immersed in anti-corrosion paste 1-3 at 130°C for 2 hours, so that the non-woven fabrics were completely immersed in the anti-corrosion paste, and high-viscosity anti-corrosion tapes 1-3 were prepared. The density of high-viscosity anti-corrosion tapes 1-3 was 1100 g / m 2 , 1250g / m 2 , 9800 g / m 2 .

[0040] Comparative Example

[0041] Preparation of common anti-corrosion tape

[0042] Preparation of common anti-corrosion paste: replace high-viscosity modified mineral fat with common mineral fat (taking lithium-based fat as an example), and put it into a reaction kettle with mineral fat, mineral oil and lubricant according to different proportions in Table 3, heat to 120°C in air atmosphere, stir for 2h, then add composite curing agent and rust inhibitor, heat to 140°C, stir for 2h, and obtain anti-corrosion paste;

[0043] The mineral grease is silicone grease, the mineral oil is Taiko oil, the thickener is epoxy resin, the lubricant is liquid paraffin, the composite curing agent is talcum powder, and the rust inhibitor is tannic acid.

[0044] The specific component contents are shown in Table 3.

[0045] Table 3

[0046]

[0047] Preparation of ordinary anti-corrosion tape: Non-woven fabrics (non-woven fabric thicknesses of 1.08 mm and 1.07 mm, respectively) were immersed in the anti-corrosion pastes 4-5 of the comparative examples at 130°C for 2 hours, so that the non-woven fabrics were completely immersed in the anti-corrosion paste, thereby preparing ordinary anti-corrosion tapes 4-5, the density of which was 1150 g / m 2 , 8800 g / m 2 .

[0048] Application Examples

[0049] The bonding strength between the high viscosity anti-corrosion tapes 1-3 of Example 2 and the ordinary anti-corrosion tapes 4-5 of the comparative example were tested for the bonding strength between the anti-corrosion tapes and the substrate using a peel strength tester and a salt spray chamber. The peel strength test procedure referred to the national standard GB / T32119-2015 "Anti-corrosion technology of multi-layer petrolatum coating for marine steel structures".

[0050] The corrosion resistance test steps are as follows:

[0051] The high viscosity anti-corrosion tapes 1-3 of Example 2 and the ordinary anti-corrosion tapes 4-5 of the comparative example were respectively coated on the polished smooth carbon steel surface with an overlap of 55%, and placed in a salt spray test box for 109 days. The anti-corrosion tapes were peeled off regularly and the corrosion conditions were recorded. The test results are shown in Table 4.

[0052] Table 4 Bonding strength between anti-corrosion strip and carbon steel

[0053]

[0054] Note: The corrosion conclusion refers to the relevant requirements of the national standard GB / T 32119-2015 "Corrosion protection technology of multi-layer mineral grease coating for offshore steel structures".

[0055] Test results of bonding strength with substrate: As can be seen from Table 4, the bonding strength of comparative example anti-corrosion strip 4 and comparative example anti-corrosion strip 5 with substrate is 180 N / m and 100 N / m respectively, while the bonding strength of anti-corrosion strip 1-3 with substrate reaches more than 500 N / m, which meets the requirements of national standard GB / T 32119-2015 for anti-corrosion strip. Compared with comparative example anti-corrosion strip 4 and 5, the bonding strength of anti-corrosion strip 1-3 with substrate is increased by nearly 3 times, which significantly enhances the viscosity of anti-corrosion strip, enhances the bonding strength of anti-corrosion strip with substrate, and increases the tightness and sealing of its coating.

[0056] Corrosion resistance test of high viscosity anti-corrosion tape and ordinary anti-corrosion tape of comparative example:

[0057] It can be seen from the test results in Table 4 that under the protection of anti-corrosion strips 1-3, good corrosion resistance was shown in the first 1000h of the salt spray test, and no rust appeared on the steel sheet surface after being wiped clean. When the salt spray test was extended to 2000h, the steel samples under the protection of anti-corrosion strips 1-3 still showed good metallic luster, no obvious rust appeared, and the rust degree was A grade; in contrast to the anti-corrosion strip 4 of the embodiment, its high viscosity modified mineral fat component was higher, but it resulted in the hardness of the anti-corrosion strip material produced, and it was inevitable that there were gaps when it was attached to the metal surface. It was able to play a good protective effect in the first 1000h of the salt spray test, but when the salt spray time was extended to 2000h, the sample was locally corroded and yellow rust appeared; in contrast to the anti-corrosion strip 5 of the embodiment, no high viscosity modified mineral fat component was added, and it was difficult to fit closely with the metal. Rust appeared in the first 1000h of the salt spray test, and the rust was more serious when the salt spray time was extended to 2000h. It can be seen that the anti-corrosion strips 1-3 show excellent corrosion protection performance. The high-viscosity anti-corrosion strip uses high-viscosity mineral fat as the paste-like base compound of the anti-corrosion strip, which greatly enhances the adhesion of the anti-corrosion strip to the substrate surface and forms a sealing layer. It can effectively inhibit the penetration and erosion of corrosion factors in the water environment, reduce the corrosion rate of the material in the corrosive environment, and thus enhance the corrosion resistance of the material.

Claims

1. A high viscosity anti-corrosion tape for marine steel facilities, characterized in that: The high-viscosity anti-corrosion tape is obtained by dipping the non-woven fabric into an anti-corrosion paste at 120-150°C; The anti-corrosion paste comprises, by weight percentage: 20-30% high-viscosity modified mineral fat, 5-10% mineral fat, 10%-25% mineral oil, 5-10% thickener, 10-20% lubricant, 20-35% composite curing agent, and 1-5% rust inhibitor; The high-viscosity modified mineral fat is a mixture of lanolin barium soap, petroleum barium soap and lanolin, and the mass ratio thereof is 2:2:3 to 2:2:2; The composite curing agent is one or more of organic bentonite, mineral mica, talcum powder or micaceous iron ash; The thickener is epoxy resin or polyisobutylene; the mineral fat is one or more of vaseline, lithium-based fat or soap-based fat; The preparation method of the high-viscosity modified mineral fat comprises the following steps: mixing lanolin barium soap, petroleum barium soap and lanolin in proportion, heating to 100-120° C., and stirring for 0.5-2 hours to obtain the high-viscosity modified mineral fat.

2. The high viscosity anti-corrosion tape for marine steel facilities according to claim 1, characterized in that: The mineral oil is one or more of diesel, engine oil, transformer oil or Taiko oil.

3. The high viscosity anti-corrosion tape for marine steel facilities according to claim 1, characterized in that: The lubricant is microcrystalline wax or liquid paraffin; The rust inhibitor is one or more of tannic acid, aminosulfonic acid, tannic acid or sodium benzoate.

4. The high viscosity anti-corrosion tape for marine steel facilities according to claim 1, characterized in that: The preparation method of the anti-corrosion paste is as follows: high-viscosity modified mineral fat, mineral fat, mineral oil, thickener and lubricant are mixed in proportion, heated to 100-120° C. in an air atmosphere, stirred for 0.5-2 hours, then a composite curing agent and a rust inhibitor are added, the temperature is raised to 120-150° C., stirred for 2 hours, and the anti-corrosion paste is obtained.

5. The high viscosity anti-corrosion tape for marine steel facilities according to claim 1, characterized in that: The non-woven fabric is immersed in the anti-corrosion paste at 120-150°C for 0.5-2 hours to obtain a high-viscosity anti-corrosion tape for marine steel facilities.

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