Coated metal substrates and methods for preparing and inhibiting corrosion of the same
AssigneePPG Industries Ohio, Inc.
InventorsBrian T. Hauser, Ralph C. Gray, Richard M. Nugent, Jr., Michael L. White
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Abstract
The present invention provides a metal substrate coated with a first pretreatment composition including a transition element-containing material having one or more Group IIIB elements, Group IVB elements, lanthanide series elements or mixtures thereof; and a second pretreatment composition including a reaction product of at least one epoxy-functional material or derivative thereof and at least phosphorus-containing material, amine-containing material and/or sulfur-containing material deposited upon the first pretreatment composition. If desired, the first and second pretreatment compositions can be combined into a single pretreatment.
Claims43
A coated metal substrate comprising:
- (a) a metal substrate;
- (b) a first pretreatment composition deposited upon at least a portion of the substrate, the first pretreatment composition comprising a transition element-containing material which comprises a transition element selected from the group consisting of Group IIIB elements, Group IVB elements, lanthanide series elements and mixtures thereof;
- and
- (c) a second pretreatment composition comprising a reaction product of at least one epoxy-functional material or derivative thereof and at least one material selected from the group consisting of phosphorus-containing materials, amine-containing materials, sulfur-containing materials and mixtures thereof deposited upon at least a portion of the first pretreatment composition.
A weldable, coated metal substrate comprising:
- (a) a metal substrate;
- (b) a first pretreatment composition comprising a transition element-containing material which comprises a transition element selected from the group consisting of Group IIIB elements, Group IVB elements, lanthanide series elements and mixtures thereof deposited upon at least a portion of the substrate;
- (c) a second pretreatment composition comprising a reaction product of at least one epoxy functional material or derivative thereof and at least one material selected from the group consisting of phosphorus-containing materials, amine-containing materials, sulfur-containing materials and mixtures thereof deposited upon at least a portion of the first pretreatment composition;
- and
- (d) a weldable composition comprising an electroconductive pigment and a binder deposited upon at least a portion of the second pretreatment composition.
A coated metal substrate comprising:
- (a) a metal substrate;
- (b) a first pretreatment composition comprising a transition element-containing material which comprises a transition element selected from the group consisting of Group IIIB elements, Group IVB elements, lanthanide series elements and mixtures thereof deposited upon at least a portion of the substrate;
- and
- (c) a second pretreatment composition comprising an ester of a phosphorus-containing material deposited upon at least a portion of the first pretreatment composition.
A method for preparing a coated metal substrate, comprising the steps of:
- (a) treating a surface of a metal substrate with a first pretreatment composition comprising a transition element-containing material which comprises a transition element selected from the group consisting of Group IIIB elements, Group IVB elements, lanthanide series elements and mixtures thereof;
- and
- (b) applying a second pretreatment composition comprising a reaction product of at least one epoxy functional material or derivative thereof and at least one material selected from the group consisting of phosphorus-containing materials, amine-containing materials, sulfur-containing materials and mixtures thereof over at least a portion of the first pretreatment composition to form a substrate having a pretreated surface.
A method for inhibiting corrosion of a metal substrate comprising:
- (a) treating a surface of a metal substrate with a first pretreatment composition comprising a transition element-containing material which comprises a transition element selected from the group consisting of Group IIIB elements, Group IVB elements, lanthanide series elements and mixtures thereof;
- (b) applying a second pretreatment composition comprising a reaction product of at least one epoxy functional material or derivative thereof and at least one material selected from the group consisting of phosphorus-containing materials, amine-containing materials, sulfur-containing materials and mixtures thereof over at least a portion of the first pretreatment composition to form a substrate having a pretreated surface;
- and
- (c) applying a weldable coating to the pretreated surface to form a corrosion-resistant coated metal substrate, the weldable coating comprising an electroconductive pigment and a binder.
A coated metal substrate comprising:
- (a) a metal substrate;
- and
- (b) a pretreatment composition deposited upon at least a portion of the substrate, the pretreatment composition comprising (1) a transition element-containing material which comprises a transition element selected from the group consisting of Group IIIB elements, Group IVB elements, lanthanide series elements and mixtures thereof;
- and (2) a reaction product of at least one epoxy-functional material or derivative thereof and at least one material selected from the group consisting of phosphorus-containing materials, amine-containing materials, sulfur-containing materials and mixtures thereof deposited upon at least a portion of the first pretreatment composition.
A method for preparing a coated metal substrate, comprising the step of treating a surface of a metal substrate with a pretreatment composition comprising (1) a transition element-containing material which comprises a transition element selected from the group consisting of Group IIIB elements, Group IVB elements, lanthanide series elements and mixtures thereof;
- and (2) a reaction product of at least one epoxy functional material or derivative thereof and at least one material selected from the group consisting of phosphorus-containing materials, amine-containing materials, sulfur-containing materials and mixtures thereof over at least a portion of the first pretreatment composition to form a substrate having a pretreated surface.
Dependencies are inferred from the claim text.