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 EP92570
- DOI 10.3221/IGF-ESIS.20.03
- Views 86
- Downloads 0
State update algorithm for associativeelastic-plastic pressure-insensitive materialsby incremental energy minimization
This work presents a new state update algorithm for small-strain associative elastic-plasticconstitutive models, treating in a unified manner a wide class of deviatoric yield functions with linear ornonlinear strai...
Prediction of the pull-out strength of chemical anchorsin natural stone
The applicability of some numerical models for the prediction of the failure mechanism and of thebearing capacity of post-installed threaded rods chemically anchored in basalt, sandstone and limestone isinvestigate...
Transverse strength of railway tracks: part 2. Test system for ballast resistance in line measurement
In the present paper, testing methods currently adopted to measure the in service ballast resistance are synthetically reviewed to identify the main sources of uncertainty influencing the test loads and to define...
Some experimental observations of crack-tip mechanics with displacement data
In the past two decades, crack-tip mechanics has been increasingly studied with full-field techniques. Within these techniques, Digital Image Correlation (DIC) has been most widely used due to its many advantages...
Multi-purpose fatigue sensor. Part 2. Physical backgrounds for damages accumulation and parameters of their assessment
The characteristic informative parameters for defect detection to be used in fatigue sensors have been established. Their development is interpreted in terms of scale levels of deformation and fracture. Damage acc...