THE CORROSION RESISTANCE OF 86% Fe-5% Si-5% Cu-4% B BRAZING ALLOY TO HIGH- TEMPERATURE LITHIUM

The 86% Fe--5% Si--5% Cu--4% B brazing alloys show better corrosion resistance to high-temperatare lithium than any of the nickel-base brazing materials tested to date. A perferential leaching of the surface of the alloy to a depth of 2 to 3 mils was observed on the alloy specimens tested in lithium at 1500 ts F. A greater weight loss, associated with subsurface voids, was found on specimens tested under dynamic conditions than was observed on the alloy when statically tested at the same temperature. This greater severity of attack in the presence of dynamic lithium was observed in otaer lithium-corrosion systems. (auth