Epoxy coal pitch anti-corrosion steel pipe manufacturer standards

For the manufacturer standards of epoxy coal pitch anti-corrosion steel pipes, please choose Hebei Tianze Pipeline Anti-corrosion Insulation Co., Ltd., two cloth and four oil anti-corrosion pipes, three cloth and five oil anti-corrosion steel pipes, epoxy coal pitch anti-corrosion straight seam steel pipes, our factory wholeheartedly provides you with Epoxy coal tar anticorrosive spiral steel pipe is what we often call several cloths and several oils. Common ones include one cloth and two oils, three oils and two cloths, five oils and three cloths, and seven oils and four cloths. The product introduction of epoxy coal tar anticorrosive steel pipes is divided into epoxy Coal asphalt primer and topcoat are made with epoxy resin and coal asphalt as the main film-forming materials, adding various anti-rust pigments/insulating fillers/toughening agents/leveling agents/thinners/anti-sedimentation agents, etc. Component B is a modified amine curing agent or the curing agent is used as the main material by adding pigments and fillers to make this product. When sold, component B is supplied as a package. Mix it according to the proportion during construction. After stirring evenly, use up the ring within the specified time. The components of oxycoal pitch anti-corrosion spiral steel pipe are epoxy coal pitch primer and topcoat, both of which use epoxy resin and coal pitch as the main film-forming materials, and add various anti-rust pigments, insulating fillers, tougheners, leveling agents and diluted Made of anti-settling agent. The appearance primer component A is iron red, component B is black, and the topcoat is all black. It has excellent resistance to chemical media corrosion and good physical and mechanical properties, good adhesion, tough coating, excellent electrical insulation and anti-permeability, resistance to stray current and resistance to microbial erosion. After film formation, The number of construction lanes can be reduced. The main implementation standards are/"Technical Standard for Epoxy Coal Asphalt Anticorrosive Layer of Buried Steel Pipelines" and/"Technical Standard for Internal Anticorrosive Layer of Liquid Epoxy Coating for Steel Pipelines". It is mainly used for the outer wall anti-corrosion of buried or underwater steel oil, gas, water, water and heating pipelines. It is also suitable for the anti-corrosion of various types of steel structure docks, ships, sluices, gas storage tanks, refinery chemical plant equipment, and concrete pipe sewage pool roof waterproof layer toilets. Waterproofing and anti-leakage of concrete structures such as basements.
Epoxy coal pitch anti-corrosion coating is composed of two main components: epoxy and coal pitch. It is a two-component coating with ethylene oxide curing agent. It has excellent adhesion, toughness, moisture resistance, water resistance and chemical media resistance. It has the ability to prevent various ions from penetrating the paint film and has the characteristics of expanding and contracting with the object being painted. The paint film never peels or cracks. Thickness ~. Epoxy coal pitch is a cost-effective form of anti-corrosion. Engineering measurements show that epoxy coal pitch plus cathodic protection is used. Oil and gas pipelines have been used for 20 years without any corrosion.
The components are epoxy coal pitch primer and topcoat, both of which use epoxy resin and coal pitch as the main film-forming materials, adding various anti-rust pigments, insulating fillers, tougheners, leveling agents, diluents and anti-rust agents. It is made of precipitating agent, etc. Component B is a modified amine curing agent or curing agent as the main material and adding pigments and fillers. When this product is sold, component B is supplied as a complete set. Mix it according to the proportion during construction. Stir evenly and use it up within the specified time.
The coating is widely used for anti-corrosion leakage of underwater steel structures and cement components, protection of underground pipelines and water tanks under gas tanks, anti-corrosion of various machinery in coastal salt fields in high-temperature areas, anti-corrosion of chemical industry and internal and external walls of other pipelines. This paint has the advantages of excellent water resistance and anti-corrosion properties of coal tar asphalt and good adhesion of epoxy resin paint, tough paint film, high mechanical strength and good resistance to chemical corrosion. Effective anti-rust paint pigments are added to the primer. Resistant to salt spray and humidity.
The market is currently flooded with epoxy coal pitch anti-corrosion steel pipes of various qualities. How to inspect anti-corrosion steel pipes with better quality requires learning the following methods
A method for measuring the adhesion of coating films
Paint Film adhesion refers to how firmly the paint film is bonded to the surface of the object being painted. Adhesion is one of the important indicators of the physical and mechanical properties of coatings. Through this inspection, the composition of the coating, especially the use of resin, can be verified to be reasonable. The adhesion of the paint film not only depends on the selected paint base material, but also has a very important relationship with the surface pretreatment construction method of the substrate and the maintenance of the paint film. For example, painting on a metal surface that is damp, rusty, and greasy. , the adhesion is poor.
There are several methods for measuring adhesion, including the circle method, the cross-hatch method, the pull-off method, the twist-off method, and the scratch method in the United States. The national standard stipulates the method of measuring paint film adhesion by the circle method, and stipulates It stipulates the use of the crosshatch method to measure adhesion, and stipulates the method of using the pull-apart method to measure coating adhesion. Among them, the easiest to apply is the circle method to measure the paint film adhesion, and the most commonly used on-site method is the cross-hatch method.
Measurement of adhesion by circle-marking method
The adhesion tester used in the circle-marking method evaluates the integrity of the paint film within the scratch range, expressed in grades. The prepared tinplate plate is fixed on the tester. To ensure that the paint film is scratched through, add weights as appropriate, shake the handle evenly with r/ in a clockwise direction, score with a circular rolling line, and take out the standard circle length. Samples, ratings. The following points need to be noted during the experiment: The needle of the measuring instrument must be kept sharp, otherwise it will not be possible to distinguish the grade. You should touch it with your finger to see if it is sharp before measuring, or change it as appropriate after measuring several test plates. .
b First try to score a few circles. The scratches should just penetrate the paint film. If the bottom plate is not exposed, add weights as appropriate but do not add too much to avoid increasing resistance and wearing the needle.
When rating, you can start with the innermost layer or the outermost circle. Check the integrity of the paint film in each part in order. If the grid of a certain part is intact as above, it is considered to be intact. , otherwise it is considered damaged. For example, if the paint film is intact and the adhesion is graded, the paint film of the part is damaged but the adhesion is intact, and the adhesion is graded second. By analogy, grade adhesion is the worst. It is usually required that the adhesion of the primer should reach grade 1, and the adhesion of the topcoat should be around grade 1.
Crosshatch method to measure adhesion
The crosshatch method adhesion test standards mainly include and. The test methods and descriptions are basically the same, except that the adhesion levels are described in the opposite order. It’s not the B-level that goes from good to bad, but it’s the B-level that goes from good to bad. The experimental tool is a cross-cut tester, which is a multi-blade cutter with three cutting surfaces. The cutter gap and cutter head can be replaced. Apply the sample to the sample plate. After drying for an hour, pull it parallel with a scratcher. There will be six cuts. The paint film should be cut through the substrate and then perpendicular to the former in the same way. The same six cuts will form many small squares. grid. For soft substrates, use a soft-bristled brush to form each diagonal line along the grid pattern, and gently sweep forward and backward several times to evaluate the grade. For hard substrates, clean first and then apply tape. Use tape, and ensure that the tape is in full contact with the experimental area. You can rub it back and forth with your fingers to make good contact, and then quickly pull it away. Use visual inspection or a magnifying glass to compare and grade the standards and illustrations.