Vol.7, No2, 2007, pp. 141-148
 UDC 620.193: 621.1

INTERGRITY OF BOILERS EXPOSED TO HYDROGEN DAMAGE

Miloš Đukić, Vera Šijački-Žeravčić, Gordana Bakić, Bratislav Rajičić 1

Biljana Anđelić 2

1) Faculty of Mechanical Engineering, University of Belgrade

2) Technical Faculty at Čačak, University of Kragujevac, Serbia

Abstract

Hydrogen damage of metal as a general concept implies mechanical damage, degradation of mechanical properties and microstructural changes caused by the presence and effects of hydrogen in the metal, mostly accompanied by simultaneous action of residual and/or exploitational tensile stresses. Independent of the hydrogen source, the hydrogen corrosion damages in boiler tubes occur frequently even in power plant installations of the most developed countries. Based on experimental results of tested water wall tube samples that sustained hydrogen damage in exploitation, and based on theoretical knowledge, a multidisciplinary survey is given on possible interacting mechanisms of metal and hydrogen from a point of view of prerequisites for damage nucleations and perturbations in hydrodynamics of the operating fluid.

Keywords: power plant components, boiler installation, water wall tubes, hydrogen damage, corrective and preventive measures

full article - only in Serbian (1.26 MB)