The influence of movement and temperature on the corrosion of mild steel. I. Water circulation apparatus and tests in teddington mains water

An apparatus designed for investigating corrosion in flowing water at speeds up to 400 ft. per min. and at temperatures up to 70° is described. Each system accommodates 36 tube specimens, each 6 in. long, and provides for three speeds of flow. Preliminary conditioning tests with a hard mains water demonstrate the applicability of the testing technique. The corrosivity of this water is largely governed by its scale-forming properties and an increase in both speed of flow and temperature promotes the deposition of a protective scale. The decrease of alkalinity due to scale deposition often results in a higher corrosion rate on specimens introduced into the system during test.