Accession Number:

AD0786730

Title:

Vita-Life 400 G Coated Flexible Conduit Exposure to Flowing Tap Water

Descriptive Note:

Corporate Author:

FRANKFORD ARSENAL PHILADELPHIA PA

Personal Author(s):

Report Date:

1974-08-01

Pagination or Media Count:

14.0

Abstract:

Ground water entering and flowing through steel pipe conduits and flexible steel conduit joints could cause reduced service life because of corrosion. A proprietary petroleum base grease, containing several percent silica-gel thickening agent and several percent of barium petroleum sulfonate water displacing and corrosion inhibiting agent has been employed as a protective coating on internal surfaces of the flexible connectors. The report describes an evaluation of the compound applied to a four inch diameter flexible connector which was subjected to flowing tap water. The report also includes an evaluation of the compound applied to mild steel coupons which were immersed in quiescent tap water. That pitting corrosion and eventual perforation of the coated flexible connector does occur along the water-air interface line is demonstrated, although other areas remain virtually intact. With coated mild steel coupons in quiescent tap water some uniform corrosion without pitting occurs, but this is minor compared to the effect on bare steel specimens.

Subject Categories:

  • Properties of Metals and Alloys
  • Pumps, Filters, Pipes, Tubing, Fittings and Valves

Distribution Statement:

APPROVED FOR PUBLIC RELEASE