Pitting corrosion of galvanized pipes in hot water supply systems

Corrosion of Galvanized Steel in Soils

The results of measurements of the corrosion of galvanized steel and of bare steel and zinc as reference materials after exposure to different soil conditions for a maximum of 13 years are reported. The magnitude and progress of corrosion of galvanized steel as determined by weight loss and pitting is interpreted in terms of the environmental conditions to which the specimens were exposed. From...

Microbiologically induced corrosion of copper pipes in low-pH water

The aim of this paper was to study the influence of microbial biofilms on the high copper levels measured in the drinking water of rural houses. Drinking water parameters and copper pipe surfaces were analysed in the copper plumbing systems of rural and urban houses. The water in rural houses had pH values of 6.2 and alkalinity values of 63mg/L as CaCO3, whereas in urban houses the pH values we...

Modelling High Pressure Flow and Replacement of Pipes in Water Supply Systems in North Portugal

Public water supply networks in Portugal do not have, in general terms, management and monitoring systems, either at the level of quality or at the level functioning of the hydraulic system itself (pressures, speeds, water leaks and losses, among others). In order for any management system to function, it is obviously necessary that its physical features are known, which does not occur in most ...

Investigation of Legionella Pneumophila bacteria in hospital water supply systems

Introduction: Legionella Pneumophila bacteria is known as one of the most important nosocomial infections and the most common cause of death in patients. This study was aimed to identify Legionella Pneumophila bacteria in hospital water supply systems. Material and Methods: This descriptive cross-sectional study was performed to identify Legionella pneumophila in hot and cold-water systems of i...

Pitting Corrosion Monitoring Using Acoustic Emission