Compositions comprising thiol-terminated polythioether prepolymers, polyepoxides and non-chromate corrosion inhibitors suitable for use in aerospace sealant applications are disclosed. Sealants prepared using the compositions adhere to a variety of aerospace substrates following exposure to aerospace fluids.

Disclosed is a phosphate coating, comprising: a phosphate portion, wherein the phosphate portion comprises pores, wherein the pores are at least partially filled with a corrosion inhibition sealant, wherein the corrosion inhibition sealant comprises: a base, wherein the base comprises a matrix and a metal within the matrix, wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or a combination thereof and an inhibitor mixed within the base, wherein the inhibitor comprises zinc molybdate, magnesium metasilicate, trivalent chromium, tungstenate, a metal phosphate silicate, or a combination thereof.

A mineral wool or other fibrous product which comprises in at least a surface layer thereof an anticorrosive composition comprising one or more alkali metal silicate components of the formula Me.sub.2O.Math.xSiO.sub.2, wherein x has a value of from 0.5 to 4.0, one or more alkali metal phosphate components of the formula Me.sub.2O:nP.sub.2O.sub.5, wherein n has a value of from 0.33 to 1 and/or hydrates thereof, and one or more carboxylic acids having 6-22 carbon atoms and/or salts thereof.

An anticorrosive composition comprising (a) one or more alkali metal silicate components of the formula Me.sub.2O.Math.xSiO.sub.2, wherein x has a value of from 0.5 to 4.0, (b) one or more alkali metal phosphate components of the formula Me.sub.2O:nP.sub.2O.sub.5, wherein n has a value of from 0.33 to 1 and/or hydrates thereof, (c) one or more carboxylic acids having 6-22 carbon atoms and/or salts thereof: and the use of the composition for imparting anticorrosive properties to a material such as a mineral wool product.

An antifreeze concentrate is based on freezing point-lowering liquids as main constituent, sulfur-comprising organic compounds as corrosion inhibitors and further corrosion inhibitors which are different therefrom. This antifreeze concentrate is suitable for coolants, for example for internal combustion engines, and for heat transfer fluids. Further an aqueous coolant composition is produced from the antifreeze concentrate showing cooling properties of this aqueous composition for an internal combustion engine whose cooling apparatus has been made from aluminum by soldering using a fluoroaluminate flux. Sulfuric organic compounds act as corrosion inhibitors in such antifreeze concentrates and aqueous coolant compositions in general.