Method of controlling the corrosion rate of alloy particles, alloy particle with controlled corrosion rate, and articles comprising the particle

A composite particle, comprising:

• a magnesium-aluminum alloy core,
• a shielding layer comprising an aluminum-containing layer deposited on the core, further comprising an interlayer region comprising γ-Mg17Al12 formed at the interface between the magnesium alloy core and the aluminum-containing layer, and further comprising inclusions of alumina, magnesia, or a combination comprising at least one of these oxides,
• a metallic layer deposited on the shielding layer, the metallic layer comprising Ni, Fe, Cu, Co, W, alloys thereof, or a combination comprising at least one of the foregoing,
• and
• optionally, an aluminum-containing adhesion metal layer deposited on the metallic layer,
• wherein the interlayer region, shielding layer, metallic layer, and optional adhesion metal layer are inter-dispersed with each other.