graphitic corrosion

graphitic corrosion

[grə′fid·ik kə′rō·zhən]
(metallurgy)
Corrosion of gray cast iron in which the metallic iron constituent is converted into corrosion products which cement together the residual graphite.
References in periodicals archive ?
Graphitic corrosion results in delloying of the iron from the steel, leaving noble carbon residue.
However, when such a pipe is located in mildly corrosive soils that are constantly moist or contain high calcium sulfate and chlorides, it is subject to graphitic corrosion.
Graphitic corrosion occurred, where the graphite in the pipe acted as a cathode and iron was selectively leached out onto the outer diameter surface of the pipe.