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Special Anti-Corrosion and Protective Polyurea Coating for Steel Strands of Cable-Stayed Bridges1
Paint CoatingRoofingAnti-Corrosion
SWD NEW MATERIAL (SHANGHAI) CO., LTD.
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Product Description STWD9008 cable-stayed bridge steel strand wires special polyurea anticorrosion wearable coatingProduct descriptions STWD9008 cable stayed bridge steel strand special polyurea is a 100% solid content aromatic polyurea elastomer. It has been applied on the cable stayed bridges in America, Europe with its excellent anticorroison, abrasion resistance performance. In early 2012, STWD Urethane USA invested a company in China that is STWD Shanghai company, in June 2012, the first batch polyurea for steel strand wires was produced in Shanghai and exported to Europe. In August 2012, Anhui transportation group tested the polyurea application on steel wires that has great effect. STWD steel strand wires polyurea is widely applied in Chinese cable-stayed bridges.Product features and advantages*Solvent free, 100% solid content, safe, environmentally friendly and odor free.*Rapid cure, can be sprayed forming on any bent, slope and vertical surfaces, no sagging.*Dense coating, seamless, with good flexibility and adhesive strength*Excellent impact resistance and abrasion resistance*Excellent corrosion resistance and chemical resistance to acids, alkali, salts etc.*Excellent anti-aging performance*Good shock absorbing performance*Excellent resistance to temperature variation*Fast cure, application site back to service quickly*Excellent durability to reduce maintenance cost of service life*Extend the service life of sprayed structure: ,,,,Product ApplicationsAnticorrosion waterproof protection of various steel wires of bridges.Products informationItemABAppearancePale yellow liquidAdjustable colorSpecific gravity (g/m3) 1.121.05Viscosity(cps)@25oC800650Solid content (%) 100100Mix ratio(by volume) 11Gel time(second)@25oC4-6Surface dry time(second)15-40Theoretical Coverage(dft)1.08kg/ Film thickness 1mmPhysical properties ItemTest standard ResultHardness (Shore A)ASTM D-224092Elongation rate(%)ASTM D-412480Tensile strength(Mpa)ASTM D-41219Tear strength (N/km)ASTM D-62467Impermeability(0.3Mpa/30min)HG/T 3831-2006impermeableWearable(750g/500r)/mgHG/T 3831-20064.2Adhesive strength(Mpa)concrete baseHG/T 3831-20063.2Adhesive strength(Mpa) steel baseHG/T 3831-200611.5Density(g/cm3)GB/T 6750-20071.02Cathodic disbondment [1.5v,(65±5)oC,48h]HG/T 3831-2006≤15mmChemical resistanceAcid resistance 10%H2SO4 or 10%HCI,30dNo rust, no bubbles, no peel offAlkali resistance 10% NaOH, 30dNo rust, no bubbles, no peel offSalt resistance 30g/L,30dNo rust, no bubbles, no peel offSalt spray resistance, 2000h No rust, no bubbles, no peel offOil resistance 0# die sel, crude,30dNo rust, no bubbles, no peel off(For reference: the above data is acquired based on GB / T9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data)Product application environmentEnvironment temperature0oC-45oCProduct spray heating temperature65oC-70oChose heating temperature55oC-65oCRelative humidity≤90%Dew point≥3oCProduct application guideRecommend spray machinePolyurea spray equipmentSpray gunFusion-air purge or mechanical purgeStatic pressure2300-2500psiDynamic pressure2000-2200psi Recommend film thickness 1000-3000μmRecoating interval≤6hApplication noteAgitate part B uniform prior to application, thoroughly mix the deposited pigments, or the product quality will be affected.spray polyurea within the proper time if the substrate surface is primed. For the application method and interval time of STWD polyurea special primer please refer to STWD companies' other brochure.Always apply STWD spray polyurea on a small area before large application to check the mix ratio, color and spray effect are correct. For detailed information of application please refer to the latest instruction sheet of the application instructions of STWD spray polyurea series.Product curing timeSubstrate temperatureDry Walking intensitycomplete solidify+10oC30s 45min7d+20oC23s 15min6d+30oC17s 5min5dNote: the curing time varies with the environment condition especially the temperature and relative humidity.Shelf Life * From the manufacturer date and on the original package sealed condition:Part A: 10 monthsPart B: 10 months*storage temperature:+5-35°C Packing: Part A 220kg/drum, part B 200kg/drumMake sure the product package sealed well* store in cool and ventilated place, avoid direct sunshine exposure.
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