Evaluation of Inhibitors for Corrosion Control of Canadian Forces Ships' Air Conditioning Hydronic Water Systems.
Abstract
Canadian Forces ships use air conditioning plants that supply hydronic water via a network of pipes, fittings and pumps that distribute the water to fan coil units throughout the ship. Hydronic water is a 90:10 mixture of fresh water and ethylene glycol which is chilled to 4.4 C by the air conditioning plants, or heated to 60 C by hot water converters. A hydronic water system is designed to be fabricated from copper or copper alloy components to minimize corrosion. As a result of an investigation of the plugging of hydronic system strainers and small orifices with hydrated iron oxide, which resulted in reducing the effectiveness of the air conditioning system, some parts of the system were found to be fabricated from mild steel. Corrosion of steel parts produces hydrated iron oxide deposits and sludges, and additional corrosion control of theses parts in either oxygen rich or oxygen deficient hydronic water environments is necessary. This report describes the results of some corrosion rate measurements that were conducted using the polarization resistance technique, to evaluate the effectiveness of various chemical inhibitor combinations and concentrations for corrosion control of steel components in oxygen rich/oxygen deficient hydronic water.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1986
- Accession Number
- ADA174922
Entities
People
- C. A. Shaw
- C. M. Hanham
- D. E. Veinot
- R. M. Armstrong
Organizations
- Defence Research and Development Canada