. Railway mechanical engineer . - for a given caseand be forced to admit that it does not fit some other. The electrol\tic theory seems to Ijt most rca.«onable when appliedto flue pitting, which assumes that there is a positive andnegative pole, with an electrolyte or carrier. In proportionas the water increases its soluble salts the efficiency of thecarrier or electrol\1e increases, therefore, an>-thing tending todiminish the power of either pole, or the carrier between them,will weaken the corrosive action. The company which furnishes the treatment we use to over-come foaming, claims that
. Railway mechanical engineer . - for a given caseand be forced to admit that it does not fit some other. The electrol\tic theory seems to Ijt most rca.«onable when appliedto flue pitting, which assumes that there is a positive andnegative pole, with an electrolyte or carrier. In proportionas the water increases its soluble salts the efficiency of thecarrier or electrol\1e increases, therefore, an>-thing tending todiminish the power of either pole, or the carrier between them,will weaken the corrosive action. The company which furnishes the treatment we use to over-come foaming, claims that it prevents foaming by changingthe nature of the soluble salts, and that this change also over-comes the to cause corrosion, by making the saltsa less active electrolyte. This claim seems to be borne out bythe fact that we have had more trouble from corrosion since. Effect of Corrosion Around Staybolts adopting superheater engines, which require a smaller quan-tit} of treatment to overcome foaming, or that part of foamingwhich formerly annoyed the engineer. This is on account ofthe tendency of the superheater to dry up the water that iscarried over. We have had cases where by washing andchanging the water frequently engineers have been able torun in bad foaming districts without the use of this they considered this a saving to the company, it de-veloped that there was damage from corrosion. We are nowusing this treatment in sufficient quantities to overcome thefoaming tendencies of the water, whether the engineers con-sider it necessar}- or not, and find that our trouble from cor-rosion is diminishing. It has been observed that passenger engines using anti-foaming compound, pitted more than freight engines on thesame district; that superheater passenger engines, in the sameservice pitted more than saturated engines, and it has bee
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
