Ferrous disintegrable powder compact, method of making and article of same

A slip element, comprising:

• a substrate formed from a sintered powder compact degradable upon exposure to a fluid;
• an outer surface disposed on the substrate;
• and
• a graded layer disposed between the outer surface and the substrate;
• wherein the sintered powder compact comprises:
• a matrix comprising a matrix material, the matrix material comprising aluminum, calcium, cobalt, copper, magnesium, manganese, molybdenum, nickel, silicon, zinc, a rare earth element, or a combination thereof;
• a plurality of dispersed particles comprising a particle core material dispersed in the matrix, the particle core material comprising a ferrous alloy which comprises carbon, the matrix being continuous and comprising a network that substantially surrounds the dispersed particles;
• the matrix and the plurality of dispersed particles having different standard electrode potentials.