Abstract: The invention relates to compositions that can be used as coatings for the inner lining of cargo tanks. The compositions comprise a mixture of epoxy resins, a curing agent, an accelerator or mixture of accelerator(s), and one or more filler(s) or pigment(s), wherein the mixture of epoxy resins comprises 60-80 wt. % of an RDGE epoxy resin and 20-40 wt. % of an epoxy novolac resin, wherein the wt. % is based upon the total weight of the mixture of epoxy resins.

Abstract: The invention relates to compositions that can be used as coatings for the inner lining of cargo tanks. The compositions comprise a mixture of epoxy resins, a curing agent, an accelerator or mixture of accelerator(s), and one or more filler(s) or pigment(s), wherein the mixture of epoxy resins comprises 60-80 wt. % of an RDGE epoxy resin and 20-40 wt. % of an epoxy novolac resin, wherein the wt. % is based upon the total weight of the mixture of epoxy resins.

Abstract: A process for primer coating a steel substrate with a primer coating comprising a silica binder, wherein the binder comprises an aqueous silica sol having a SiO2/M2O mole ratio, wherein M represents the total of alkali metal and ammonium ions, of at least 6:1, and wherein after the primer coating has dried to the extent that it is touch dry, the coated substrate is immersed in water or alternatively kept in an atmosphere with a relative humidity of at least 50%.

Abstract: A process for primer coating steel which is intended to be fabricated and overcoated, in which process the steel is primer coated with a primer coating comprising a silica binder. The binder comprises alumina-stabilized aqueous silica sol and, optionally, a minor amount of alkali metal silicate. The binder has a SiO2/M2O mole ratio, wherein M represents the total of alkali metal and ammonium ions, of at least 6:1. After the primer coating has dried to the extent that it is touch dry, it is optionally treated with a solution which increases the film strength of the primer coating.

Abstract: Coating composition suitable for coating a metal, preferably steel, substrate which is intended to be fabricated and overcoated, said composition comprising: i) zinc powder and/or a zinc alloy and ii) a modified silica sol comprising colloidal silica particles modified with 6-40 wt % of one or more silane compounds, based on the combined dry weight of silane compound(s) and colloidal silica particles, and being obtainable by adding said silane compound(s) to a silica sol with a rate of not more than 20 silane molecules per nm2 colloidal silica surface per hour. This coating composition has a relatively long pot life, good white rust resistance, and good film properties.

Abstract: A process for primer coating of steel which is intended to be fabricated and overcoated, in which process the steel is primer coated with a primer coating comprising a silica or silicate binder, wherein the binder comprises an aqueous silica sol or alkali metal silicate having a SiO2/M2O mole ratio, where M represents total alkali metal and ammonium ions, of at least 6:1, and that after the primer coating has dried to the extent that it is touch dry it is treated with a solution which increases the film strength of the primer coating.

Abstract: The present invention relates to a composition for coating a metal substrate which is intended to be fabricated and overcoated, and wherein the binder comprises an aqueous silica sol or alkali metal silicate having a SiO2/M2O mole ratio of at least 6:1, where M represents total alkali metal and ammonium ions, and wherein the silica particles have an average size equal to or smaller than 10 nm. Very good results are obtained if the dried coating is post-treated with a film-strengthening solution.

Abstract: A process for primer coating steel which is intended to be fabricated and overcoated, in which process the steel is primer coated with a primer coating comprising a silica binder. The binder comprises alumina-stabilized aqueous silica sol and, optionally, a minor amount of alkali metal silicate. The binder has a SiO2/M2O mole ratio, wherein M represents the total of alkali metal and ammonium ions, of at least 6:1. After the primer coating has dried to the extent that it is touch dry, it is optionally treated with a solution which increases the film strength of the primer coating.