Marine anticorrosive powdered paint and preparation method thereof

A powder coating and marine anti-corrosion technology, applied in anti-corrosion coatings, powder coatings, coatings, etc., can solve the problems of PE water permeability, high air permeability, poor anti-corrosion effect, and inability to do it, and achieve the effect of improving the anti-corrosion effect.

Inactive Publication Date: 2013-04-10
杭州五源科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of PE powder coatings as heavy-duty anti-corrosion powder coatings is not currently available on the market. The main obstacle is that PE has high water permeability and air permeability. Even if the PE layer is intact, the molecular gap of PE is large, and small corrosion molecules can penetrate these molecules. gaps, thereby contacting the base metal that is supposed to be protected
Therefore, the anti-corrosion life of PE powder coatings is not too

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] Marine anti-corrosion powder coating 1, the coating formulation includes, medium density polyethylene (MDPE), glass flakes and spherical zinc powder. Among them, 100 kg of MDPE, 5 kg of glass flakes and 30 kg of spherical zinc powder.

[0041] Preparation of the above-mentioned raw materials:

[0042] The medium density polyethylene (MDPE), glass flakes and spherical zinc powder of the above formula are mixed uniformly in a mixer for 5 minutes, and then placed in a screw extruder for granulation at a temperature of 190-230 °C and a rotation speed of 300-500r / min to obtain plastic particles, and then grind these particles in a pulverizer.

Example Embodiment

[0043] Example 2

[0044] Marine anti-corrosion powder coating 2, the coating formulation includes, high density polyethylene (HDPE), flake glass, flake zinc powder and lubricant. Among them, 100 kg of HDPE, 20 kg of flaky neutral glass, 5 kg of flaky zinc powder, and 0.1 kg of lubricant.

[0045] Preparation of the above-mentioned raw materials:

[0046] Mix the above formula HDPE, flake glass, flake zinc powder and lubricant in a mixer evenly for 10min, then put it in a screw extruder for granulation, the temperature is 190-230°C, and the speed is 300-500r / min to obtain plastic particles, and then pulverize these particles in a pulverizer.

Example Embodiment

[0047] Example 3

[0048]Marine anti-corrosion powder coating 3, the coating formulation includes, low density polyethylene (LDPE), high density polyethylene (HDPE), flake glass, flake zinc powder and lubricant. Among them, 50 kg of LDPE, 50 kg of HDPE, 30 kg of flake neutral glass, 20 kg of flake zinc powder, and 1 kg of lubricant.

[0049] Preparation of the above-mentioned raw materials:

[0050] The LDPE, HDPE, flaky neutral glass, flaky zinc powder and lubricant of the above formula are mixed uniformly in a mixer for 10 minutes, and then placed in a screw extruder for granulation at a temperature of 190-230 ° C and a rotating speed of 300-500r / min to obtain plastic particles, and then grind these particles in a pulverizer.

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PUM

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Abstract

The invention provides marine anticorrosive powdered paint and a preparation method thereof. The formula of the paint comprises polyethylene, glass flakes and zinc powder, wherein the polyethylene is one or a combination of low-density polyethylene (LDPE), medium-density polyethylene (MDPE) and high-density polyethylene (HDPE); the glass flakes are scalelike glass flakes which are 40-3000 meshes; and the glass flakes are made of alkali glass or neutral glass. According to the invention, the glass flakes and the flaky zinc powder are added in the polyethylene (PE) base, so that glass layers and zinc layers having good barrier effect are distributed in the PE powder, wherein the glass layers can resist acid, alkali, salt and water, and the scalelike glass flakes can form multiple barrier layers in the PE layer. Thus, corrosive small molecules pass through the barrier layers as if passing through a maze and need to travel on a long and tortuous road, thereby improving the anticorrosive effect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a marine anti-corrosion powder coating and a preparation method thereof. Background technique [0002] In the process of ocean development and utilization, humans have built many large offshore structures. Considering the engineering cost and comprehensive performance of materials, most of these offshore structures are made of carbon steel and low-alloy steel with high strength, high toughness and low price. Usually, the design life of large-scale marine engineering structures ranges from 20-30 years to 40-50 years. In order to ensure the safe service of these steel structures, effective protective measures must be taken. [0003] At present, for the anti-corrosion design of large-scale marine steel facilities, organic coatings are generally applied to the water area, and cathodic protection technology is used in the underwater area. Because the organic coating is easy to age,...

Claims

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Application Information

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IPC IPC(8): C09D123/06C09D7/12C09D5/10C09D5/03
Inventor 周宏宇陆国建曾永远
Owner 杭州五源科技实业有限公司
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