The Bacterial Corrosion of Iron and Steel

Microelectrode investigation of iron and copper surfaces aged in presence of monochloramine

“…At pH 9 without orthophosphate (Figure 1c), the DO concentration decrease was also nearly complete at the reactive surface, but with orthophosphate (Figure 1d), a measurable value still existed at the reactive surface (1–2 mg L −1 ), indicating that at pH 9, orthophosphate presence led to a greater surface concentration under both flow and a 30‐min stagnation period. Finally, once DO is depleted, ferric oxide solids in the scale may serve as an alternative oxidant (Benjamin et al, 1996; Sarin, Snoeyink, Bebee, et al, 2004).…”

Letter Circular 689:

“…The bacteria discussed by von VJolzogen Killhr are active only under anaerobic conditions. Beckwith (12) has suggested that some aerobic bacteria also may influence corrosion.…”

“…The bacteria discussed above are anaerobic and thrive onlv in soils nearly free from oxygen. According to Beckwith (12), there are also some aerobic bacteria which may cause or accelerate corrosion. The methods used in the construction of pipe lines are the indirect causes of much of the corrosion of the lines.…”

Experiences With Cathodic Protection of Water Tanks

“…In the JOURNAL for 1941, so far, three papers (8,9,10) and 15 abstracts refer to cathodic protection. The operating experiences outlined in some of the 1941 publications are pertinent to the subject of this paper although they do not refer directly to water tanks.…”