Abstract: Disclosed herein is a pretreatment composition comprising a Group IVB metal in an amount of 200 ppm to 5.000 ppm based on total weight of the pretreatment composition, total fluoride in an amount of 1.000 ppm to 25.000 ppm based on total weight of the pretreatment composition and an electropositive metal. Also disclosed herein is a pretreatment composition comprising a Group IVB metal in an amount greater than 500 ppm based on total weight of the pretreatment composition and free fluoride in an amount of 50 ppm to 750 ppm based on total weight of the pretreatment composition, wherein the pretreatment composition has a pHI greater than 4. Also disclosed herein are systems and methods for treating a substrate. Also disclosed herein are treated substrates.

Abstract: Disclosed herein is a composition comprising a first lanthanide series metal, wherein the composition has a pH of less than 2.0 and is substantially free of peroxide. Also disclosed herein is a composition comprising a first lanthanide series metal and at least one of a second lanthanide series metal, copper, an inorganic phosphate compound, an organophosphate compound, and an organophosphonate compound; wherein the composition is substantially free of peroxide. Also disclosed herein are systems and methods of treating a metal substrate. Also disclosed are substrates treated with the systems and methods.

Abstract: Disclosed herein is a system for treating a magnesium or a magnesium alloy substrate comprising: a first pretreatment composition comprising a fluorometallic acid and free fluoride in an amount of 10 ppm to 500 ppm based on total weight of the first pretreatment composition and having a pH of 1.0 to 4.0; and a second pretreatment composition comprising a lanthanide series metal, the second pretreatment composition being substantially free of peroxide. Also disclosed are methods of treating a magnesium or magnesium alloy substrate. Treated magnesium and magnesium alloy substrates also are disclosed.

Abstract: Disclosed is a sealing composition for treating a metal substrate comprising: a polyolefin component; and a colloidal layered silicate. Also disclosed is a system for treating a metal substrate comprising: a cleaner composition; and/or a pretreatment composition for treating at least a portion of the substrate, the pretreatment composition comprising a Group IVB metal; and a sealing composition for treating at least a portion of the substrate treated with the cleaner composition and/or the pretreated composition, the sealing composition comprising a polyolefin component. Also disclosed is a method of treating a substrate comprising contacting at least a portion of a surface of the substrate with any of the compositions disclosed herein or any of the systems disclosed herein.