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 adjust the material's consistency, AKRUS® utilizes specialized thinners tailored for both external and internal surfaces. In instances where these thinners are unavailable, it's advisable to seek guidance from an AKRUS® specialist to identify suitable alternatives. Additionally, solvents like acetone, P-4, P-5, and others are employed for equipment cleaning purposes.
This type of coating is usually classified according to three parameters: by area of application (industrial 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 plays a crucial role in the drying process and film formation of paint. It's a fundamental principle that higher temperatures lead to faster drying times. Chemically drying and air-drying paints both experience accelerated drying at higher temperatures. The necessary drying time and minimum drying temperature are typically outlined 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 issue could arise due to several factors: Excessive film thickness of the product applied. Poor air conditions during application, such as cold temperatures, high humidity, or inadequate ventilation. Incorrect quantity or poor quality of the hardener or solvent added to the product. Incompatibility between the hardener or solvent used and the product being applied.
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 primary methods of drying and curing paint coatings: physical drying, oxidative curing, and chemical curing.
AKRUS® marine paint coatings can be applied in winter conditions, including negative temperatures from -5°C and below, with certain exceptions. For detailed information and guidance tailored to your specific requirements, please consult the technical experts at AKRUS®.
Surface preparation requirements vary depending on the type of work being carried out. We recommend thoroughly cleaning the surface to remove klinker, rust, salts, oils, moisture, and other contaminants. In new construction projects, abrasive blasting up to Sa 2? (ISO 8501-1:2007) is necessary. If required, our interoperative primer AKRUS® Epoks Praym can be used for temporary protection. Before final painting, it's essential to remove any damaged interoperative primer and dirt.
During repairs, surface preparation involves removing oils, fats, and other contaminants, washing with fresh water under high pressure to eliminate salts and other pollutants, and conducting abrasive blasting to at least the degree of surface preparation Sa 2, or mechanically cleaning damaged areas to the degree of surface preparation St 3 (ISO 8501-1:2007). We recommend achieving a surface preparation level of Sa 2? (ISO 8501-1:2007) for optimal results.
For repair work, options involving spot cleaning (T/U) of the surface to the degree of Sa 2-2.5 are feasible. It's crucial to discuss these details during the preparation of the paint specification. The better the surface preparation, the longer-lasting the coating system will be.
The guaranteed shelf life of AKRUS® coatings varies depending on the type, ranging from 12 to 36 months. For detailed information, please contact the technical experts at AKRUS®.
Paint storage in a closed container is feasible even at negative temperatures down to -30°C. However, prior to use, it is essential to heat the coatings to room temperature.
Certainly, our coating materials hold certifications from both the Russian Maritime and River Register of Shipping and the Russian River Register. Should you require these certificates, we are prepared to provide them upon request.
The AKRUS® Strong marine coating is specifically designed to safeguard the outer hull of vessels during ice navigation conditions, particularly for icebreakers across all ice classes and for vessels classified as Arc4 and higher.
The application method for AKRUS® Strong involves airless spray application. For vessels operating in long-term Arctic ice conditions (ARC-7), a single layer of 450-500 microns is recommended. Surface preparation to the SA 2.5 degree is necessary. Prior to use, the material should be stored at 20°C for 24 hours, ensuring thorough mixing for a homogeneous consistency.
When applying, use airless spraying units with separate supply of hardener and base, preheated to 40-60°C. Avoid multiple heating of the same material. Apply the coating in one layer under ambient temperatures of 5 to 35°C and relative humidity of up to 80%. Re-application on a previously coated AKRUS® Strong surface is permissible if the previous layer is below the recommended thickness. The allowable overlap interval is up to 10 days.
AKRUS® Strong is recommended for application within the temperature range of 5°C to 35°C, with a relative humidity of no more than 80%. In subzero temperatures, it is necessary to provide shading and warm up the air to ensure optimal application conditions.