Analysis of the causes of failure in 5Cr-1Mo pipes mounted in a preheating furnace
Journal Title: Frattura ed Integrità Strutturale - Year 2012, Vol 6, Issue 20
Abstract
The oxidation resistance of iron-based alloys depends on the formation of thin protective films consisting of reaction products between the alloys and the ambient atmosphere. The high corrosion resistance of Fe-Cr-Mo alloys has been attributed to the rapid formation of a uniform, highly protective passive film. The pipes hardness and resistance to various forms of corrosion are determined by the composition of the oxide layer that plays an important role in determining the lifetime of the pipes themselves. The thermal stability of the oxide layer is influenced by its composition and thickness as well as by the bond to the underlying metal. Determining factors for the high temperature corrosion are generally: temperature, metallurgy, TAN (chloridric and naphthenic acid), local flow conditions, sulphur compounds.
Authors and Affiliations
Adelina Borruto , Giovanni Narducci , Pietro Pietrosanti
Keywords
Related Articles
- EP ID EP92571
- DOI 10.3221/IGF-ESIS.20.03
- Views 87
- Downloads 0
Random accumulated damage evaluation under multiaxial fatigue loading conditions
Multiaxial fatigue is a very important physical phenomenon to take into account in several mechanical components; its study is of utmost importance to avoid unexpected failure of equipment, vehicles or structures...
Research on borehole stability of shale based on seepage-stress-damage coupling model
In oil drilling, one of the most complicated problems is borehole stability of shale. Based on the theory of continuum damage mechanics, a modified Mohr-Coulomb failure criterion according to plastic damage evoluti...
Experimental and numerical study of cemented bone-implant interface behaviour
Although the total hip replacement (THR) is a long-proven method of surgical treatment of diseases and disorders of the human hip, the surgery brings some risk of long-term instability of the joint. The aim of the resear...
Evaluation of seismic mitigation of embankment model
Conducting experiment on embankment model by shaking table could be an accurate method to evaluate the behavior of embankment or any structures under seismic loading. In this research work, in order to assess the functi...
Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture
Fatigue (high- and gigacycle) crack initiation and its propagation in titanium alloys with coarse and fine grain structure are studied by fractography analysis of fracture surface. Fractured specimens were analyze...