Electrolytic corrosion in reniforced concrete

While reinforced concrete was coming into general use as a structural material much space in the technical press was given to discussions and reports on the durability of the encased iron. The results from a large number of experiments gave fairly conclusive evidence that under ordinary conditions the iron is protected, and that even if it was rusty when placed in the concrete, it will be free from the oxide after remaining in the concrete for some time. The time test on the durability of practical structures is, of course, the final arbiter, and for each year the increasing data bears out the assumption that properly constructed concrete-steel structures will stand indefinitely.