Preparation method of pigment for ship bottom antirust coating, pigment and coating
A technology for anti-rust coatings and pigments, applied in the direction of anti-corrosion coatings, coatings, fibrous fillers, etc., can solve the problems of long construction intervals, lower performance of finished coatings, non-compliance, etc., to achieve improved resistance to medium penetration, high anti-rust Anti-corrosion ability and the effect of reducing the range of burning loss
Inactive Publication Date: 2020-01-17
焦作玛珂蒎新材料有限公司
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Problems solved by technology
In addition, the painting site of the ship is generally in a humid environment with large temperature changes such as rivers and seaports, and the construction interval is long, which requires a longer protection period for the paint.
[0003] At present, there are three technological principles for ship anti-rust coatings to resist seawater corrosion: 1. The principle of cathodic protection is mainly used to install devices such as potentiostats on ships to form a protective current on the surface of the ship. This working principle is not to protect the paint from corrosion Improve the anti-rust performance; 2. Use lead-based, zinc-based, chromium-based and other passivating pigments to manufacture coatings to form a passive film on the surface of the ship, thereby improving the anti-corrosion and anti-rust performance of the ship. The coating made of this working principle is heavy metal High content, toxic, unfriendly to the processing environment and use environment, does not meet the current "green" development requirements, and is being phased out; 3. Use coatings with low ion permeability to form shielding paint films, mainly using aluminum Powder, mica iron oxide, mica powder and other flaky mineral pigments are added with activators, and the pigments are activated and then combined with coating resins to form antirust coatings; such as the existing glass flake glass antirust paint, its The scales in the film are arranged in parallel with dozens of layers of shielding structure, so that the corrosive medium penetrates and diffuses in the paint film in a complex and tortuous path, thereby prolonging the penetration time; this principle belongs to the current mainstream research direction, but there is no suitable active agent yet and pigments, nor can it be determined whether the activator reacts additionally with the resin, thereby degrading the performance of the finished coating
Method used
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Embodiment 1
[0031] A method for preparing pigments for ship bottom anti-rust coatings, including the following steps:
[0032] 1. Raw material selection: Choose white dry, soft clay, in Bo'ai County, Henan Province. Its mineral composition is unstable, sometimes pure kaolinite, sometimes a mixture of kaolinite and pyrophyllite, both of which are layered silicates. , And they are all traditional paint fillers, as long as part of the aluminum ions can be dissolved out, it can produce activity. Therefore, whether the mineral composition is pure or not will not be affected. However, when choosing raw materials, choose kaolinite as the main ore;
[0033] 2. Crushing: crush the raw materials to particles with a particle size of about 1mm through a jaw crusher, and then grind them to a particle size of 100 mesh through a Raymond mill;
[0034] 3. Calcining: send the product of step two into a rotary kiln, heat it to 650°C, and keep it at a constant temperature for 1 hour to obtain a calcined material; ...
Embodiment 2
[0055] The pigment of Example 1 was processed instead of the existing pigment and paint to obtain a ship bottom anti-rust paint.
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The invention belongs to the technical field of anticorrosive paints, and discloses a preparation method of a pigment for a ship bottom antirust coating. The preparation method comprises the followingsteps: kaolinite crushing, calcining, acid solution dissolution, filter pressing, filter cake drying, grinding and the like. The pigment and the coating are also disclosed. The beneficial effects arethat the pigment has good salt water resistance, salt fog resistance and weather resistance, is high in adhesive force and resistance to precipitation, does not contain any harmful heavy metal, and is developed by utilizing various environment-friendly antirust coatings. The coating is wide in application range and is mainly used for ship bottom antirust coating, can also be used for ships, highways, railways, high-voltage wire steel frame pipelines, equipment and pipelines of petrochemical plants and other outdoor steel structure facilities. The coating has the characteristics of light application range, no toxicity and high corrosion resistance.
Description
Technical field [0001] The invention relates to the technical field of anticorrosive materials, in particular to a method for preparing a pigment for ship bottom anticorrosive paint, and also relates to a pigment prepared by a method for preparing a pigment for ship bottom antirust paint and a paint prepared by using the pigment. Background technique [0002] As one of the three major shipbuilding processes, ship coating plays an increasingly important role in modern shipbuilding and shipbuilding. Most ships are used in the harsh and corrosive environment of the ocean, such as ocean atmosphere, sea water splash, sea water immersion, high temperature and humidity. Therefore, there are extremely high requirements for the corrosion resistance and rust resistance of ship coatings. In addition, the coating site of ships is generally in a humid environment with large temperature changes such as rivers and seaports, and the construction interval is long, which requires a longer protecti...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C09C1/42C09D5/08
CPCC01P2006/32C09C1/42C09D5/084
Inventor 刘俊刘源刘新霞张廉正刘新中贺长启
Owner 焦作玛珂蒎新材料有限公司