Patent ID: 9682425
Date: 2017-06-20
CPC Classifications: B22F,Y10T

Claim:
1. A metallic powder comprising a plurality of metallic powder particles disposed in a powder compact, each powder particle comprising: a particle core, the particle core comprises a core material comprising Mg, Al, Zn or Mn, or a combination thereof; and a metallic coating layer disposed on the particle core and comprising a metallic coating material, wherein the metallic coating layer comprises a plurality of coating layers, and wherein a first coating layer comprises Al, a second coating layer comprises Al, Zn, Mn, Mg, Mo, W, Cu, Fe, Si, Ca, Co, Ta, Re, or Ni, or an oxide, nitride or carbide thereof, or a combination of any of the aforementioned second coating layer materials, and a third coating layer comprises Al, Zn, Mn, Mg, Mo, W, Fe, Si, Ca, Co, Ta, Re, or Ni, or a combination thereof, wherein the first coating layer has a chemical composition that is different than a chemical composition of the second coating layer, and the chemical composition of the second coating layer is different than a chemical composition of the third layer, and wherein the powder compact of the powder particles is selectively and controllably dissolvable in a predetermined wellbore fluid comprising potassium chloride, hydrochloric acid, calcium chloride, calcium bromide or zinc bromide.