Rust paint anti-corrosion steel company level qualification - steel corrosion treatment

First, the project belongs to the building steel structure engineering, corrosion material selection C53-31 Red Lead Alkyd antirust paint, topcoat mixed paint. Rust quality level should meet the national standard GB10923 in Sa1 / 2 standard. Second, the main equipment: spray guns, hoses, small blade, hand wheel, wire brush, small compressor, paint buckets, brushes and the like. Third, the working conditions: 1 painter special types of construction work due operations permit. 2 corrosion before painting works Steel Works has been checked and accepted, and meet the design requirements. 3 anti-corrosion coating job site safety measures should have fire and ventilation measures to prevent fires and poisoning incidents. 4 outdoor corrosion construction work should select the appropriate weather, wind, rain, cold etc should work. Fourth, the operation process: a process: the paint coating 2 construction steel structure should be installed after the acceptance carried out in steel. Before painting the painting should be required to paint parts of rust, weld epidermis, weld spatter, grease, dust and other debris to clean up. 3 base surface cleaning rust quality is directly related to the coating quality is good or bad. Therefore, the quality of the base surface rust coating process is divided into primary and secondary, are shown in Table 5-25 of the provisions. Fifth, in order to ensure the quality of coating, according to different needs can use the following separately descaling process. 1 sand-blasting, it is the use of compressed air pressure, continuous impact surface of steel components with quartz sand or iron ore, the steel surface rust, oil and other debris clean, revealing a rust metal steel qualities Methods. High efficiency of this method, thoroughly rust, rust is more advanced technology. 2 pickling rust, which is the coating of steel components for an acid dip in the pool, with an acid to remove oil and rust member surface. Pickling process efficiency is high, rust more thorough, but members must be flushed with hot water or water after pickling, if there is the presence of residual acid, corrosion member will be more powerful. 3 artificial rust, is by hand with some relatively simple tools, such as hand mill, wire brush and other tools, remove rust on the steel members. This method is low efficiency, poor working conditions, rust nor thorough. (This project uses the first three rust) VI Primer: 1 blending red antirust paint, paint viscosity control, consistency, dilution, stirring should be sufficient against the system, so that the paint color, viscosity uniform. 2 Brush the first layer of paint brushing direction should be consistent, then hew tidy. 3 Paint should use ground-stick, the principle of short brush, brush with paint to prevent too much flow fall. 4 brushing until the first pass, should maintain a certain time gap, to prevent the first pass was dry on the second pass, it would fall wrinkled paint flow, quality. 5 After the first pass to be dry, paint the second time, the second time brushing direction should be perpendicular to the brushing direction of the first pass, it would be a uniform film thickness. 6) After the primer coating at least 4 ~ 8h required to reach a tack after, not before coating finish is dry. Seven paint coating: 1 construction steel priming and topcoat generally intermediate space longer. After painting rust steel components to the site to assemble, after the end of the assembly unified paint finish. Thus the need to finish before painting steel surface clean, clear installation welds to burn off or touch to paint the member should fill paint beforehand. 2 finish modulation should choose exactly the same color of paint, thinner should be made against the appropriate topcoat should stir before, to maintain color uniformity. Its operating viscosity, consistency should ensure that the coating does not flow when you fall, no significant brushed. 3 finish in the course should continue to mix, brushing method and direction of the same with the process described above. 4 applied by spray coating process, should adjust nozzle diameter, spray pressure, spray gun hose can be stretched to the work area free air compressor pressure should be at 0.4 ~ 0.7N / mm. 5 spray nozzle should be kept well away from the coating, usually from the gun and the work surface should be about 100mm, the angle of the gun and the steel base should remain vertical, or on the nozzle slightly inclined appropriate. 6 spray nozzle should be parallel move, smooth move should be consistent speed, the coating is uniform. However, when spraying, coating thickness is generally thinner, it should be sprayed more times, each time spraying should be the upper film already drying. Eight, coating inspection and acceptance: After a construction time and construction of surface coating, painting had to deal with the workpiece is protected against dust and other debris flying. Check 2 after the coating process, the coating should be the same color, bright, vivid color, do not wrinkle the skin, can not afford pimple. 3 coating film thickness was measured, with the contact-type film thickness measuring film thickness, the film thickness is generally measured thickness of 3 points, the mean value. Nine, quality standards ensure that the project shall meet the following requirements: 1 paint, thinners and curing agents variety, type, and quality should meet the design requirements and current national standards. Inspection method: check the quality certificate or reinspection report. 2 steel surface rust before painting should meet the design requirements and current national standard requirements: The chemical rust steel surface should be exposed metallic color. Steel surface treated should be no welding slag, burrs, dust, oil, water and burrs. Inspection method: check with the blade and with current national standards, "the steel surface before painting Rust grades and preparation grades" provides a picture control observation inspection. 3 must not mistake coating, holidays, coating should be no peeling and rust return. Inspection method: observation inspection. Ten, the basic project shall meet the following requirements: 1 appearance quality painting project: Qualified: brushing should be uniform, no wrinkled skin, bubbles, good adhesion. Excellent: brushing should be uniform, consistent color, wrinkle-free skin, flow fall and bubbles, good adhesion, color separation line clear and tidy. Inspection method: observation inspection. 2 members make up the painting quality: Qualified: make paint film should be complete. Excellent: stratified according to the coating process up brush, paint a complete, good adhesion. Check number: the number of checks per class member by 10%, but shall not be less than three. Inspection method: observation inspection. Allow paint dry film thickness of 3 Deviation engineering and inspection methods shall conform to Table 5-26. Dry film thickness values ??and tolerance requirements values ??should be consistent with "steel construction and acceptance" provisions. Check number: Press the same number of member checks 10%, but shall not be less than three, each measuring 5, the value of each of the three distance measuring points a dry film thickness of about 50mm average. XI finished product should be protected by a steel member after painting temporary containment isolation to prevent treading, damage coating. 2 After coating steel components, should be covered, or place the existing processing shed, prevent rain after rain, soil contamination affecting the adhesion of the coating. 3 after coating member to be transported, it should be taken to prevent knocking, to prevent drag on the ground to prevent damage to the finish. 4 after the coating of steel components do not touch the liquid acids to prevent bites coating. Twelve, should pay attention to the quality of a coating operation temperature should be between 5 ~ 38 ℃ is appropriate, when the weather temperature is below 5 ℃, should use the appropriate low temperature coating material is applied. 2 When the temperature is higher than 40 ℃, should stop the coating operation. Because members temperature exceeds 40 ℃, the steel surface brushing paint can produce bubbles, reduce adhesion of the film. 3 When the humidity is greater than 85%, or component surface condensation, not suitable for the coating operation. Member should be substantially dry surface after condensation, before brushing operation. Jiangsu Ding longtime high-altitude project adhere to the people-oriented, follow the "quality first, the owners first, abide by the same combination, quality service," the purpose, regular visits! Sincere welcome to all enterprises, institutions and individuals to come to inquire, negotiate. Mobile: 15365765466 Tel: 0515-88297688 QQ: 3147994242 Contact: Mr. Wang Address: South New Tongyu Road 139 Website: http: //www.jsdinglt.com/ http://www.jsdinglongtai.com/ http : //www.dinglongtai.com/