There are many ways of applying paint and varnish materials. Yet, three methods are most often used: manual methods of coloring (brush, roller), pneumatic spraying, and airless spraying.
Surface cleanliness control should be carried out according to SUST 9.402 or ISO 8501-1 standards (regarding cleaning from corrosion products and previous coatings). The surface cleanliness must correspond to degree 2 according to GOST 9.402 (or with the abrasive blasting method of cleaning to a degree not lower than Sa 2 ½ when using a manual mechanized tool to the degree of St3 according to ISO 8501-1), the degree of degreasing of the surface is 1 according to SUST 9.402.
If it is necessary to fix the coating, it must be done immediately after the damage is detected. Repair of surface areas in the places of mounting fasteners of scaffolding, etc., must be carried out during the disassembly of the frame or installation of structures. Repair of minor, local damage to the coating layer's coating is to be carried out by applying an additional layer of AKRUS® Polyur enamel with a brush. Repair of significant damage to the coating is carried out by restoring the coating following the manufacturer's recommendations.
There is no clear difference between enamels and paints. Usually, enamels are called a suspension of pigments or a mixture of pigments that forms an opaque solid film with a different gloss and surface texture after drying. If drying oils or oils are used as a film-forming substance, then such a material is called paint.
Paint and varnish materials are applied to the protected surface, tend, according to multilayer systems, which may consist of primers, putties, and enamels for various purposes. At the same time, the paint and varnish materials must be compatible with each other. The ISO 12944-5 standard defines the compatibility of paint and varnish materials as the ability of two or more paint and varnish materials to be used in a coating system without revealing undesirable effects.
To thin the material, branded thinners for external and internal surfaces of AKRUS® are used. If the client does not have specific thinners, it is necessary to consult an AKRUS® specialist about replacement. Solvents such as acetone, P-4, P-5, and others are used to wash the equipment.
This type of coating is usually classified according to three parameters: by field of application (protective and decorative), by type of film—forming substance (alkyd, alkyd-urethane, acrylic, polyurethane, epoxy compounds), by type of base (organo-soluble and water-soluble), by component (one-component and two-component compositions)
It is necessary to remove pollutants and water-soluble salts that make it difficult to process and color by removing dirt and grease (see ISO 12944-4) and degreasing.
Temperature has a significant impact on the drying of the paint and the formation of the film. The higher the temperature, the faster the drying of the paint is an immutable rule. The drying of chemically drying and air-drying paints accelerates significantly with increasing temperature. The required drying time and minimum drying temperature are specified in the product description.
Fire-resistant coatings of the AKRUS® are represented by products: AKRUS® P, AKRUS® P (GR), AKRUS® P (E), AKRUS® Vent, AKRUS® basalt foil material.
Paints and coatings are made using many raw materials and additives, but they are based on three main groups: binders, pigments, and solvents.
This case may be due to excessive film thickness of the product, poor air conditions during application (cold, humidity, lack of ventilation), incorrectly added quantity or poor quality of the hardener or solvent, as well as if the hardener or solvent does not correspond to this product
Coatings for internal surfaces are represented by the following products: AKRUS® primer Praym and enamel AKRUS® Long, designed for anticorrosive protection of tanks operated under the impact of oil, as well as ballast tanks. AKRUS® Long Aqua enamel, designed to protect food containers. AKRUS® Pipe enamel, designed for anticorrosive protection of steel pipes and pipelines.
There are three main types of drying and curing of paint coatings: physical drying, oxidative curing and chemical curing.
AKRUS® marine paint coatings in winter can be applied at negative temperatures from −5C and below, with some exceptions. For more information, please contact the technical experts of AKRUS®.
Surface preparation depends on the type of work. We recommend cleaning the surface of klinker, rust, salts, oils, moisture, and other contaminants. In new construction, abrasive blasting up to Sa 2½ (ISO 8501-1:2007) is required. If necessary, you can use the interoperative primer AKRUS® Epoks Praym for temporary protection. Before the final staining, it is necessary to remove the damaged interoperative soil and dirt. During the repair, it is essential to remove oils, fats, and other contaminants, remove salts and other pollutants by washing with fresh water under high pressure, and carry out cleaning by abrasive blasting minimally to the degree of surface preparation Sa 2 or cleaning damaged areas mechanically to the degree of surface preparation St 3 (ISO 8501-1:2007); recommended degree of surface preparation Sa 2½ (ISO 8501-1:2007). During the repair, options with spot cleaning (T/U) of the surface to the degree of Sa2-2.5 are possible. Additionally, this information must be agreed upon during the preparation of the paint specification. The better the surface is prepared, the longer the coating system will last.
The guaranteed shelf life of AKRUS® coatings, depending on the types of coatings, ranges from 12 to 36 months. For more information, please get in touch with the technical experts of AKRUS®.
Yes, paint storage in a closed container is possible at negative temperatures up to -30C. Before use, heating of coatings to room temperature is mandatory.
Yes, our Paint and varnish materials have certificates of the Russian Maritime and River Register of Shipping and the Russian River Register. If necessary, these certificates can be provided.
AKRUS® Strong marine paint coating is created to protect the vessel's outer hull from external forces in ice navigation conditions for icebreakers of all ice classes and for vessels of ice classes Arc4 and higher.
Apply by airless spray. For vessels constantly operating in conditions of long-term Arctic ice (ARC-7), the coating is applied in one layer of 450-500 microns. In this case, preparing the surface to the degree of SA 2.5 is necessary. Before use, the material must be kept at 20°C for 24 hours. It is necessary to make sure that the base of the material is well-mixed and homogeneous. The coating is applied by airless spraying units with a separate supply of hardener and base in a preheated state to a temperature of 40-60°C. Multiple (more than two times) heating of the same material is not allowed. The coating is applied in one layer at an ambient temperature of 5 to 35°C and a relative humidity of up to 80%. It is possible to re-apply to a previously coated AKRUS® Strong surface if the previous layer is less than the recommended thickness. The possible overlap interval is up to 10 days.
AKRUS® Strong is recommended to be applied in the range of temperatures from 5°C to 35°C, with a relative humidity of no more than 80% of the air. It is necessary to shade and warm up the air at subzero temperatures.