Örtliche Korrosion von Komponenten aus Messing MS 58 in der Trinkwasser-Installation

Localized corrosion of yellow brass 58 in tap water installation Yellow brass material with 58 wt.-% Cu is subjected to dezincation and cracking in tap water. Both kinds of corrosion are enhanced by tensile stresses and by anodic polarisation resp. oxygen content of the water. Furthermore, the water type has an effect, where - according to this investigation – the chloride content is of interest. The presence of critical components for SCC (such as NH₃) are not necessary. In the case of mixed installation with tubing of inert material (such as stainless steel or plastics) the corrosion likelihood is increased in comparison to galvanised steel or copper because of oxygen consumption by corrosion of the latter materials. Bimetallic corrosion in mixed installation with stainless steel does not take place. Failures of components of domestic installations by corrosion should be prevented by using a material having a higher resistance to dezincation.