Science: Steam-Cleaned Pipes

In the euphony of current advertisements, water pipe manufacturers have been trumpeting, bugling, tooting and piping the merits of various pipe materials. Brassmen have clarioned that brass pipes last a lifetime, do not rust. Ironmen have said the same for iron-pipes.

Meanwhile steel-pipe makers have been whistling through their fingers. Steel is iron mixed with and hardened by carbon. Because it is easier to produce steel than to rid iron of its impurities, steel is cheaper than pure iron. It is also cheaper than-iron or steel alloys, and than copper alloys. But it oxidizes...

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