Corrosion of Steel by Sulphur: Although joints made with commercial plasticised sulphur cement, properly made, do not cause attack on iron or steel pipes, steel is attacked when immersed in aqueous dispersions of elementary sulphur. Further light was thrown on this phenomenon in recent tests with low‐carbon steel panels having an area slightly greater than 4 sq. in. and weighing approximately 16 g. These were essentially unaffected when completely immersed for seven days in tap water, distilled water or dispersions of bentonite in water, but weight losses as high as 1.87 g. were noted when immersed in dispersions of sulphur in water. In the absence of a dispersion agent, the weight loss of the test panels was 1.8 g., or 8.6%. In contrast, the weight loss was less than 0.25 g. when the specimens were immersed in 3% hydrochloric acid.
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