Examples of ship painting construction skills, hull coating technical requirements

Summary. 3. After surface treatment, the primer of the workshop should be sprayed as soon as possible, and it is not allowed to be painted after rusting on the surface of the steel.

Hello dear, the technical requirements for hull painting are.

1. The outer plate of the hull, the orange deck board, the bulkhead board, the bulwark board, the outer plate of the superstructure, the interior grinding sail board and the blind hail composite profile and other internal plates are shot blasted before blanking to meet the Swedish rust removal standard, and the primer of the zinc-rich workshop is immediately sprayed once.

2. The internal profiles of the hull are sandblasted to meet the Swedish rust removal standard, and the primer of the zinc-rich workshop is sprayed immediately.

3. After surface treatment, the primer of the workshop should be sprayed as soon as possible, and it is not allowed to be painted after rusting on the surface of the steel.

4. The surface of the hull that has been coated with the bottom talk mold paint or other coating wheels and materials should be retreated when further coated, and the grade standard should meet the standard of (CB*3230-85).

5. Before opening the can, you should first check whether the paint variety, brand, color and storage period are consistent with the use requirements, and whether the thinner is rolled and smoothed. Once the can is opened, it should be used immediately.

6. After the paint is opened, it should be fully stirred evenly, and the epoxy paint should be reinforced, stirred thoroughly, and pay attention to the mixing time before construction.

7. During construction, if the paint needs to be diluted, the appropriate thinner should be added according to the instructions of the paint manufacturer, and the amount added is generally not more than 5% of the paint amount.

Make a reference, oh, the above is the technical requirements for hull coating.

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Ship coating is used in the surface decoration of the ship, it has a certain waterproof effect, can make the ship walk on the water without rust and so on, what are the characteristics of the ship coating? After some people buy marine coatings, they will not know the process decoration effect of this coating, let's take a look at the process requirements of ship coatings.

First, the characteristics of Lingshan marine coatings.

1. It has good adhesion, good water resistance, chemical resistance and wear resistance, and excellent performance. Ship anticorrosive paint can be used under harsh strip transportation delays, and has a long-term anti-corrosion life, Fuxi anticorrosive paint can generally be used for more than 10 or 15 years in the chemical atmosphere and marine environment, even in acid, alkali, salt and solvent media, and under certain temperature conditions, it can also be used for more than 5 years.

2. Thick film and reasonable price are important symbols of ship anticorrosive paint.

3. Strong adhesion of marine paint: strong adhesion between the coating and the substrate.

4. Ship paint is efficient and convenient, and the construction is simple.

Second, the ship coating process requirements.

The parts above the deck, the inside and outside of the bulwark, the deck exterior panel, the outer hull panel, and the rudder paddle plate of the engine room are sprayed. Pre-coat manual welds, fillet welds, profile backs, and free edges before painting. Other parts are applied by brush and roller coating.

The construction should be carried out in strict accordance with the "List of Paint Grades, Coating Numbers and Dry Film Thickness of Each Part of the Hull". Painting must be cleaned on the painted surface to meet the requirements, inspected by specialized personnel, and approved by the owner's representative. The type of painting tool should be adapted to the paint used, and the complete set of tools should be thoroughly cleaned when switching to a different type of paint.

When applying the next coat of paint, the surface of the previous coat should be kept clean and dry, and the drying time should not be less than the minimum coating interval specified by the manufacturer. In order to reduce the workload of secondary surface cleaning, all welds, cuts, free edges (free edges require chamfering) and pyrotechnic burn parts (excluding watertight test welds) should be cleaned immediately after welding and cutting, and the corresponding workshop primer should be used to repair the paint. For parts with high requirements for surface aesthetics, defects such as sagging and accumulation of coating should be avoided.

Third, the selection of marine coatings.

The selected marine coatings must meet the specified technical conditions, and the unqualified coatings cannot be constructed.

Before opening the can, you should first check whether the paint variety, grade, color and storage period are consistent with the use requirements, and whether the thinner is matched. Use as soon as the can is opened.

After the paint is opened, it should be fully stirred evenly, and the epoxy paint should be reinforced, stirred thoroughly, and pay attention to the mixing time before the construction can be carried out.

During construction, if the paint needs to be diluted, the appropriate thinner should be added according to the instructions of the paint manufacturer, and the amount added is generally not more than 5% of the amount of paint.

The characteristics of marine coatings are as above. Buying marine paint is because there is a need, and its characteristics are also one of the requirements that people choose. If you don't know how to use it after buying marine coatings, you should hand it over to professionals to use marine coatings, which will be different from ordinary marine coating requirements.

Ship painting is the construction of surface painting after grinding and sandblasting the hull, compartment and accessories of the ship during ship repair, and then carrying out surface painting operations after meeting the requirements of rust, pollution removal and scar removal.

Method 1: Roller coating method.

This type of paint application method refers to painting with a roller covered with paint. The drum should not be stained with too much paint, the paint does not overflow on both sides of the drum as the principle, the drum can not roll too fast when painting, the drum should be slowly rolled up and down, left and right, the rough surface, the weld should pay special attention, and the corners should be repaired with a paint brush. The roller coating method is more efficient and is used when painting large areas, but the roller coating method cannot be used for fast-drying paints.

Method 2: Brush application.

As the name suggests, it refers to the use of paint brushes to staggered longitudinal and horizontal paint on the surface of components. Brush coating has a strong penetrating force, can make the paint penetrate into the pores and gaps, when the surface of the steel plate has moisture, the brush can squeeze out the water, so that the paint really adheres to the component, in addition, the brush also saves the coating. However, the brushing method is inefficient, and it is only used in small areas, corners and individual places when touching up paint.

Method 3: Airless spraying method.

This high-tech coating construction method refers to spraying the paint with high pressure, and the paint is forced to atomize at the nozzle outlet and spray onto the surface of the coated object to form a paint film. Compared with the spraying method, the airless spraying has less scattering, is more efficient, and can apply a thicker film, so it is especially suitable for large-area applications. However, when using airless spraying, the technical requirements for labor are higher, and fire prevention should also be paid attention to.

At present, almost all shipyards use this method when painting large areas.

Method 4: Spraying method.

The spraying method is to atomize the paint with compressed air with a pressure of 3-5Pa and spray it onto the surface of the coated object to form a paint film. When spraying, the nozzle should be perpendicular to the surface to be painted, and should move up and down in parallel, without swinging. When using the spraying method, special attention should be paid to keeping the surface to be coated very clean and dry, otherwise the adhesion of the paint will be reduced, and the paint scattering and solvent volatilization caused by compressed air will be a lot, and special attention should be paid to sparks.

The spraying method has high efficiency and is suitable for large-area painting, but the paint scattering causes part of the paint loss.