Aluminum and aluminum alloy electroplated coatings

A coated steel substrate, comprising:

• a high strength steel substrate;
• and
• a multiple-layer electroplated aluminum coating over the steel substrate, the multiple-layer electroplated aluminum coating comprising at least one porous layer and at least one compact layer, the at least one porous layer comprising a material selected from a group consisting of aluminum and aluminum alloys, and the at least one compact layer comprising a material selected from a group consisting of aluminum and aluminum alloys,
• wherein the at least one porous layer has a plurality of pores having a pore size of about 2 μm or more,
• wherein the at least one porous layer has a thickness from about 0.3 μm to about 3 μm,
• wherein the at least one compact layer has a thickness from about 0.3 μm to about 3 μm, and
• wherein the compact layer comprises a plurality of pores having a pore size of about 0.2 μm or less.

A component, comprising:

• a substrate;
• an electroplated aluminum coating disposed over the substrate, wherein
• the electroplated aluminum coating is a multiple layer aluminum coating comprising at least one first electroplated aluminum layer, wherein the first electroplated aluminum layer comprises a plurality of pores having a pore size of about 2 μm or more, and
• at least one second electroplated aluminum layer disposed over the first electroplated aluminum layer, wherein the second electroplated aluminum layer comprises a plurality of pores having a pore size of about 0.2 μm or less, and
• the electroplated aluminum coating comprises a total thickness of about 10 μm to about 40 μm.