High-temperature chlorine corrosion of metals and alloys

Chang, Yao-Nan; Wei, Feng

doi:10.1007/bf01184958

Cited by 53 publications

(29 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Because all the steels exposed in chlorine-rich atmosphere showed high degree of corrosion degradation, the presented corrosion mechanism can be assumed for all the steels exposed in this study. In contrast to Chang et al [17] results, the test performed at 450°C in this study indicates that some protective scale formation was found only when Cr addition was given to 15MH and 10H2M steels; in other cases when steel showing lack of Cr addition even at temperatures lower than 500°C, development of non-protective scale took place.…”

Section: Cross-sectional Morphologiescontrasting

confidence: 99%

“…The diagram represents phases formed upon chlorination conditions using 0.3 %Cl 2 -Ar; the graph was performed using FACTSAGE software with FTSALT database. According to the literature [17] stability diagram, FeCl 3 phase is stable up to 300°C; further above this temperature, FeCl 3 melted, and therefore volatilisation process occurs. The phase diagram shows that the stability of FeCl 2 is much higher compared to that offered by FeCl 3 .…”

Section: Surface Morphologiesmentioning

confidence: 98%

See 1 more Smart Citation

Chlorine Corrosion Degradation of Low Alloyed Ferritic Steels in Temperature Range 450–550 °C

Dudziak¹,

Jura²,

Rutkowska³

2016

Oxid Met

View full text Add to dashboard Cite

The paper shows the results obtained under chlorination conditions on low alloyed steels 15HM (T/P12), 16M (T/P1), 18K, and 10HM2 (T22) in the temperature range 450-550°C for 100 h. The tests were performed in a gas mixture of 0.3 % Cl 2 -Ar under 1 bar pressure. The results indicated that the low alloyed steels underwent a high degree of corrosion, showing lack of protection under reducing atmosphere. However, some differences regarding chemical composition of the bare steels were found. The scale thicknesses, chemical compositions of chloride scales developed on the exposed samples were analysed by means of standard techniques including scanning electron microscope coupled with energy X-ray dispersive spectroscopy.

show abstract

Section: Cross-sectional Morphologiescontrasting

confidence: 99%

Section: Surface Morphologiesmentioning

confidence: 98%

Chlorine Corrosion Degradation of Low Alloyed Ferritic Steels in Temperature Range 450–550 °C

Dudziak¹,

Jura²,

Rutkowska³

2016

Oxid Met

View full text Add to dashboard Cite

show abstract

“…A vapor pressure of 10 −4 atm is considered critical for the high-temperature corrosion of metals in the presence of chlorine due to the sublimation of metal chlorides. 23,24 In fact, if the chloride vapor pressure is lower than this value, the transport of metal by means of vapor diffusion gives a negligible contribution to mass transport through the scales. On the contrary, when the chloride vapor pressure exceeds this value, vapor diffusion becomes more and more important with respect to solid-state metal diffusion and produces a significant acceleration of the corrosion rate, possibly also changing gradually the oxidation kinetics from a parabolic to a linear type of behavior.…”

Section: Discussionmentioning

confidence: 99%

The Corrosion Behavior of Four Commercial Steels in Reducing Atmospheres Containing HCl At 773?873 K

et al. 2004

View full text Add to dashboard Cite

The corrosion of four Fe-Cr commercial steels with different chromium contents in a simulated waste-gasification atmosphere containing 0.5 vol.% H 2 , 0.5 vol.% HCl, balance CO 2 has been investigated at 773 and 873 K. The same materials have also been tested in the same gas mixture free from HCl at both temperatures for comparison. The results show that the materials with low-chromium content (2.25CrMoV and NF616) undergo accelerated corrosion in the presence of HCl, while the stainless steel SS304 suffers very little corrosion. On the contrary a steel containing 12 wt.% Cr (12CrMoV) corrodes rather rapidly at 773 K but quite slowly at 873 K. The beneficial effect of chromium on the corrosion resistance of the steels increases with the chromium content at both temperatures. The steels tested show corrosion rates generally decreasing with time, having kinetics which are approximately parabolic at 773 K but intermediate between parabolic and linear at 873 K. Only little or even no chlorine can be detected at the scale/metal interface at both temperatures for all materials corroded in HCl-containing atmospheres. The corrosion mechanism can be explained by the so-called "active-oxidation" model.

show abstract

“…La velocidad de corrosión del hierro en HCl(g)/N 2 (g) está descrita por Chang y Wei [13] . A temperaturas por debajo de 500º C, la corrosión tiene una cinética parabólica debido a la formación de una capa protectora de cloruro de hierro sobre el metal.…”

Section: Condiciones Reductorasunclassified

Review about corrosion of superheaters tubes in biomass plants

Labari¹,

Fernández-Carrasquilla²

2006

Rev. metal.

View full text Add to dashboard Cite

ResumenEn el diseño de plantas de biomasa es muy importante tener en cuenta la temperatura del vapor para no tener problemas de corrosión. Esto, es debido al alto contenido de potasio y cloro que tienen la mayoría de los biocombustibles y, en especial, la paja de cereal. El objetivo de esta revisión es condensar el conocimiento actual sobre la corrosión de los sobrecalentadores a altas temperaturas provocada por compuestos clorados en plantas de biomasa. El cloro puede causar corrosión acelerada debido a la pérdida de metal del sobrecalentador, ataque interno y formación de capas de óxidos no adherentes. Los problemas de corrosión más severos en una caldera de biomasa se producen en los depósi-tos formados sobre los tubos sobrecalentadores. En la primera parte de esta revisión, se describen los mecanismos de corrosión propuestos en función de las condiciones de trabajo predominantes en la caldera. La segunda parte, se centra en revisar los estudios realizados para comprobar el comportamiento de los materiales mediante ensayos realizados en la caldera y en el laboratorio. En primer lugar, se describen las investigaciones realizadas sobre aleaciones convencionales y después las realizadas sobre las aleaciones desarrolladas en los últimos años y recubrimientos. Palabras claveCorrosión a altas temperaturas. Corrosión por depósitos. Corrosión gaseosa. Biomasa. Sobrecalentadores. Review about corrosion of superheaters tubes in biomass plants AbstractThe design of new biomass-fired power plants with increased steam temperature raises concerns of high-temperature corrosion. The high potassium and chlorine contents in many biomasses, specially in wheat straw, are potentially harmful elements with regard to corrosion. Chlorine may cause accelerated corrosion resulting in increased oxidation, metal wastage, internal attack, void formations, and loose non-adherent scales. The most severe corrosion problems in biomass-fired systems are expected to occur due to Cl-rich deposits formed on superheater tubes. In the first part of this revision the corrosion mechanism proposed are described in function of the conditions and compounds involved. The second part is focused on the behaviour of the materials tested so far in the boiler and in the laboratory. First the traditional commercial alloys are studied and secondly the new alloys and the coatings.

show abstract

High-temperature chlorine corrosion of metals and alloys

Cited by 53 publications

References 26 publications

Chlorine Corrosion Degradation of Low Alloyed Ferritic Steels in Temperature Range 450–550 °C

Chlorine Corrosion Degradation of Low Alloyed Ferritic Steels in Temperature Range 450–550 °C

The Corrosion Behavior of Four Commercial Steels in Reducing Atmospheres Containing HCl At 773?873 K

Review about corrosion of superheaters tubes in biomass plants

Contact Info

Product

Resources

About