Published June 1990
| Version v1
Journal article
Influence of HCl and Cl2 on high temperature corrosion of 2 1/4 Cr1Mo steel in atmospheres with high oxygen pressures
- 1. Max-Planck-Institut fuer Eisenforschung GmbH, Duesseldorf (Germany, F.R.)
Description
The oxidation of the 2 1/4-Cr1Mo steel was investigated at 773 K in oxidizing He-O2-HCl atmorpheres. The addition of HCl to He-O2 atmospheres leads to accelerated oxidation rates. Below porous and cracked oxide scales condensed chlorides are formed. At low HCl pressures 0-1000 vppm the 'active oxidation' is determining the corrosion process; i.e. oxidation of evaporating chlorides within the oxide scale. For higher HCl contents 1000-3000 vppm the corrosion behaviour changes to paralinear; i.e. simultaneous parabolic oxide growth and linear mass loss by chloride evaporation. (orig.)
Abstract (German)
Die Oxidation des 2 1/4 Cr1Mo-Stahls in oxidierenden He-O2-HCl-Atmosphaeren bei 773 K wurde untersucht. Der Zusatz von HCl zu He-O2-Atmosphaeren fuehrt zu stark beschleunigter Oxidation. Unter poroesen und rissigen Oxidschichten bilden sich feste Chloride. Bei niedrigen HCl-Druecken 0-1000 vppm bestimmt 'aktive Oxidation' den Korrosionsprozess; d.h. Oxidation fluechtiger Chloride innerhalb der Oxidschicht. Bei hoeheren HCl-Druecken 1000-3000 vppm erfolgt ein Uebergang zum paralinearen Korrosionsverhalten, d.h. gleichzeitiges parabolisches Oxidwachstum und lineare Massenabnahme durch das Abdampfen von Chloriden. (orig.)Additional details
Additional titles
- Original title (German)
- Einfluss von HCl und Cl
Publishing Information
- Journal Title
- Werkstoffe und Korrosion
- Journal Volume
- 41
- Journal Issue
- 6
- Series
- Werkst. Korros.
- Journal Page Range
- 303-307
- ISSN
- 0043-2822
- CODEN
- WSKRA
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 21082330
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHLORINE; CONTROLLED ATMOSPHERES; CORROSION PRODUCTS; HYDROCHLORIC ACID; MICROSTRUCTURE; OXIDATION; OXYGEN; STEEL-CR2MO
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; CHLORINE COMPOUNDS; CHROMIUM ALLOYS; CROLOY; CRYSTAL STRUCTURE; ELEMENTS; HALOGEN COMPOUNDS; HALOGENS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; LOW ALLOY STEELS; MOLYBDENUM ADDITIONS; NONMETALS; STEELS
Optional Information
- Contract/Grant/Project number
- Contract BMFT 11E1051