Flash rust inhibition

Flash rusting is the phenomenon of formation of small brown rust spots that appear very soon after application of waterbased systems directly to steel. The problem is more prominent when the steel surface is active (for example, after blasting) and the pH is <7. To combat this problem, flash-rust inhibitors are added to waterbased coatings. They should have good water solubility. Flat surfaces are relatively easy to protect, while weld areas are considered difficult. Flash-rust inhibition at a weld area can be achieved by a combination of different products. Flash-rust inhibitors are typically based on ammonium and sodium nitrites, benzoates, metaborates and phosphates, occasionally in combination with materials such as morpholine and amino methyl propanol. Some other organic salts are also used, such as amine salts of 2-mercaptobenzothiazolyl succinic acid and calcium or barium salts of linear alkyl naphthalene sulfonic acids. Typically they are used at levels of 0.1 to 1.0 % of the total mass of paint. They also help in preventing in-can corrosion upon storage of aqueous paint. 

Chem. Descrip. Amine functional silicone polymer Uses Silicone for prod, of silicone-org. copolymers for use in textiles, rust-inhibitive coatings, detergent-resist, car polishes rubber and plastic mold release internal mold release lubricant Features Compat. with dimethyl silicone fluids, aliphatic and aromatic hydrocarbon soivs. good heat stability high amine-alkyl content Properties Colorless to It. straw, clear to hazy liq. sp.gr. 0.98 dens. 8.0 Ib/gal vise. 450 cSt amine no. 110 flash pt. (PMCC) > 200 F 100%. act. Toxicology Alkaline material prevent contact with skin, eyes Storage Stable indefinitely in closed containers store below 100 F moisture-sensitive keep container tightly closed do not weld or cut drum, even when empty... 

Uses Corrosion/rust inhibitor in water-based protective coatings inhibits flash rust and In-can rusting stabilizes metal substrates for water blasting... 

BUTENE OXIDE (106-88-7) Forms explosive mixture with air (flash point -7°F/-22°C). Unless inhibited, violent polymerization can be caused by elevated temperatures, sunlight, acids, aluminum chlorides, bases, iron, tin, potassium, sodium, sodium hydroxide, or certain salts. Reacts violently with oxidizers, alcohols. Reacts with hydroxides, metal chlorides, oxides. Flow or agitation of substance may generate electrostatic charges due to low conductivity. Storage tanks and other equipment should be absolutely dry and free from air, ammonia, acetylene, hydrogen sulfide, rust, and other contaminants. 

PHENYLETHYLENE (100-42-5) Forms explosive mixture with air (flash point 88°F/31°C). Unless inhibited (often with tert-butylcatechol) in adequate concentrations, polymerization may occur and container may explode. Polymerization can be caused by elevated temperatures above 151°F/66°C, oxidizers, butyl lithium, peroxides, UV light, or sunlight. Violent reaction with chlorosulfonic acid, strong oxidizers, sulfuric acid, xenon tetrafluoride. Incompatible with acids, rust, catalysts for vinyl polymerization, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, peroxides, metal salts (e.g., aluminum chloride, copper chlorate, manganese nitrate, etc.). Corrodes copper and its alloys. Attacks some plastics, rubber, or coatings. Flow or agitation of substance may generate electrostatic... 

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