PointsYouShouldBeInformedAboutCorrosionControlProtection

1. Points You Should Be Informed About Corrosion Control & Protection Protective Coatings Anti corrosive pigments are:- a) Red Lead b) Zinc Chromate c) Zinc Phosphate d) Zinc Dust Preventing corrosion involve minimizing the flow of corrosion current so that if negligible current, negligible corrosion result. Resins with highest electrical resistance are, catalyzed epoxy, phenol, vinyl and chlorinated rubber. Addition of pigments such as talc, china clay, mica and iron oxide also help in helping the resistance. The removal of soluble deposits about the steel surface is essential for their presence will short circuit the resistance of the paint film to stage where rusting can take place. The thicker the coating the bigger could be the electrical resistance. Coatings limit the access of oxygen, water and salts and for that reason control corrosion in this manner by the purely barrier effect. Catalyzed epoxies, coal tar epoxies, polyurethane, vinyl's and chlorinated rubber coatings hold the lowest permeability to water and oxygen. Alkyd and oil based coatings are more permeable to corrosive agents than high performance coatings specified to ensure all corrosive substances are taken out of the steel surface and maximum adhesion is achieved between your coating and steel. The coatings chosen or specified needs to be conducive to the environment, characteristic and purpose the substrate is subjected.

2. For purpose to stop and resist causes by:- a) Chemical spillage b) Chemical fumes c) Hot temperature d) Skid resistance e) Abrasive resistance f) Oil resistance g) Fireproof Forms of Coatings Normally coatings are conventional coating systems or high end systems. The conclusion on the coating for use depend on the price and budget one have plus the expected life or time period of the coatings as well as the required function of the coatings, because of the security, decoration or coding purposes, etc. For coding and decorative purposes, conventional systems usually are recommended nevertheless for protection purposes, powerful systems are suggested. Conventional coatings are often one pack product whilst powerful coatings appear in two packs. Single pack product usually are air drying, two pack products normally cure by chemical reaction about the base through the catalyst or hardener. For the most powerful results, it's always best to consult the makers who will be specialised in manufacturing certain variety of coatings. Many are specialised in decorative coatings for houses, or protective coatings for industrial purposes or marine coatings vessels and ships or automotive coatings for vehicles or special coatings for appliances or air crafts. See a right manufacturer for the ideal type of coatings needed. Form of Application Application can be done by brush, roller, conventional spray or airless spray. Brush and roller are utilized where condition does not allow air or airless spray. Not good for top build coatings or achieve high film thickness. Slow in process and coverage is around 180m2 to 380m2 per man

3. day. Conventional spray is acceptable for decorative and coding as only thin film is possible. For defense purposes, airless spray is usually recommended and it is the quickest approach to application. Covers 750m2 to 1100m2 per man day. Charge of application is as simple as tip size and input and output pressure. Bring most paint types and may achieve high film thickness. Application Condition Paint should not be utilized for adverse conditions, like temperature below 5 degrees C instead of above 35 degrees C. Not inside a windy condition or when surfaces are wet due to rain, snow, ice, fog or condensation. Allow painting only once surface climate is 3 degrees C across the dew point. Paint Mixing Every new tin of paint opened must be mixed thoroughly having a stirrer to disperse the solids. In 2 pack products, to ensure the base and hardener can chemically react together and cure, always use a mechanical mixer. Always mix base and hardener within the correct ratio. Paint Thinning Use thinners not until necessary. Use the correct thinner for your product. Don't use a lot more than 5% by amount of thinners. Excessive use can cause solvent entrapment, runs, sags, slumping, retard cure and affect wet film thickness and dry film thickness ratio. Pot Life All two pack products have a very pot life. That is time frame between mixing and curing once the paint is workable and could be applied. Pot every day life is temperature related. Never mix over can be utilized before pot life expires. Exceeding pot life will waste paint and may block up airless spray equipment. Airless Spray Procedures Check tip size and output pressure. Hold spray gun 30 cm to 45 cm through the surface. spray gun to become parallel to surface 90 degrees as a result. Horizontal pass 50 cm to l meter. Overlap previous pass by 50% whenever possible to ensure even film thickness. Trigger to be sold at the conclusion of each pass. Cross hatching recommended for even film thickness. For more information about Polymer check out our website