Aspects described herein generally relate to a sol-gel that is the reaction product of an organosilane, a metal alkoxide, an acid, and chromium (III) salt and/or a lanthanide salt having a solubility of about 1 gram or greater per gram of sol-gel at 23 C. The lanthanide salt includes a cation and a ligand. The cation can be lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium, cobalt, calcium, strontium, barium, and zirconium. A ligand can be a nitrate, a trifluoromethane sulfonate, a sulfate, a phosphate, a hydroxide, or hydrate forms thereof. The chromium (III) salt includes a cation and a ligand. The cation is chromium (III) and the ligand can be a nitrate, a trifluoromethane sulfonate, a sulfate, a phosphate, a hydroxide, or hydrate forms thereof.

A composition for application to a metal substrate comprises a sol-gel or a silane and a corrosion inhibitor. The corrosion inhibitor comprises a lithium ion and/or an azole compound. A coated substrate includes the composition for application to a metal substrate and a coating on the composition. A method of fabricating a coated substrate comprises applying the composition to a substrate, curing the composition to form a conversion coating, and applying a coating on the conversion coating.

A tank or a pipe having an internal steel surface, at least a portion of the internal steel surface comprising a coating system. The coating system being formed of an overcoat layer and an overcoat-enhancing layer, the overcoat-enhancing layer being interposed between the steel surface and the overcoat layer. In use, the overcoat-enhancing layer enhances the chemical resistance of the overcoat layer to aggressive cargo types.

A method for forming and bonding a corrosion resistant perovskite layer on a surface of a steel component, for example, a stainless steel crucible is disclosed. The method comprises preparing an inhibitor mixture comprising about 0.5% to about 5% by weight of a rare-earth oxide and about 0.1% to about 1% by weight of an oxidizer; preparing a molten chloride salt mixture comprising a predetermined concentration of one of a binary eutectic mixture and a ternary eutectic mixture, mixing the inhibitor mixture to the molten chloride salt mixture to produce an inhibitor salt mixture; applying the inhibitor salt mixture to the surface of the steel component to be bonded with the perovskite layer; and heat treating the steel component with said applied inhibitor salt mixture to a predetermined temperature to form and bond the perovskite layer on said surface of said steel component.

A corrosion-resistant coating composition is provided. The composition includes a binder system comprising at least one polymeric resin and an inorganic bismuth-containing compound. Methods of coating and using the coating composition are also provided.

A powder coating composition is described. The composition includes an inorganic bismuth-containing compound or a mixture of inorganic and organic bismuth-containing compounds. The powder composition demonstrates a high degree of cross-linking in the coating and produces a cured coating with optimal crosslinking and corrosion resistance.

The present invention relates to an anticorrosive composition and the use of such a composition for imparting anticorrosive properties to a material, and a material comprising such a composition.

A ZnAl layered double hydroxide (LDH) composition is added to a solution including a corrosion inhibitor and stirred, and a precipitate of the solution is collected, washed, and dried to form a corrosion inhibiting material (CIM), in which the LDH composition is intercalated with the corrosion inhibitor. An inorganic CIM and/or an organic CIM may be formed. The organic CIM may be added to a sol-gel composition to form an organic CIM-containing sol-gel composition, and the inorganic CIM may be added to a sol-gel composition to form an inorganic CIM-containing sol-gel composition. Further, the organic CIM-containing sol-gel composition may be applied on a substrate (e.g., an aluminum alloy substrate) to form an organic CIM-containing sol-gel layer and cured by ultraviolet (UV) radiation, the inorganic CIM-containing sol-gel composition may be applied on the substrate to form an inorganic CIM-containing sol-gel layer and cured by UV radiation, and the sol-gel layers may be thermally cured.

A coating for protecting a substrate from corrosion includes a first layer having a first composition applied on the substrate. The coating has a thickness of at least 0.5 m. The first composition includes an intercalated mixture of a polymer and a clay according to a formula of (P.sub.x/C.sub.1-x).sub.v, where v comprises a volume of the intercalated mixture applied to the substrate.

A coating method for a clad steel in which stainless sheets are combined on adjacent surfaces of an aluminum sheet may include preparing the clad steel, preparing a coating solution in which an epoxy resin and titanium dioxide (TiO.sub.2) powder are combined in an acrylic resin, etching the clad steel to improve adhesion property between the coating solution and the clad steel, heating the clad steel, and performing electrodeposition by immersing the clad steel in the coating solution.