Improving the corrosion resistance of ferritic-martensitic steels at 600 °C in molten solar salt via diffusion coatings

2021 ◽  
Vol 227 ◽  
pp. 111105
Author(s):  
Tobias M. Meißner ◽  
Ceyhun Oskay ◽  
Alexander Bonk ◽  
Benjamin Grégoire ◽  
Alexander Donchev ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Martensitic Steels ◽  
Solar Salt ◽  
Diffusion Coatings

scholarly journals Scale Formation and Degradation of Diffusion Coatings Deposited on 9% Cr Steel in Molten Solar Salt

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 687 ◽  
Author(s):  
Ceyhun Oskay ◽  
Tobias M. Meißner ◽  
Carmen Dobler ◽  
Benjamin Grégoire ◽  
Mathias C. Galetz
Keyword(s):  
Cost Efficiency ◽  
Prolonged Exposure ◽  
The Other ◽  
Austenitic Steels ◽  
Alumina Scales ◽  
Martensitic Steels ◽  
Concentrated Solar Power ◽  
Solar Salt ◽  
Diffusion Coatings ◽  
Highly Porous

The employment of ferritic-martensitic steels e.g., P91, as structural materials in concentrated solar power (CSP) plants can significantly increase cost-efficiency. However, their application is strongly restricted by their lower corrosion resistance in molten nitrates, compared to austenitic steels or Ni-based alloys. In this study, Cr-, Al-, and Cr/Al-diffusion coatings were deposited on P91 via pack cementation in order to improve its scaling behavior in molten solar salt (MSS). The corrosion behavior of coated specimens was investigated with respect to uncoated P91 in MSS at 600 °C for up to 1000 h. The exposure in MSS resulted in a thick, highly porous, and multi-layered oxide scale on uncoated P91 consisting of hematite, magnetite, and sodium ferrite. On the other hand, the scale grown on the chromized P91 comprised of a thin Cr-rich inner layer, which shifted breakaway to prolonged exposure durations. The aluminized specimens both formed very thin, highly protective alumina scales with localized protrusions.

Development of novel diffusion coatings for 9-12 % Cr ferritic-martensitic steels

2005 ◽  
Vol 56 (12) ◽  
pp. 874-881 ◽  
Author(s):  
V. Rohr ◽  
M. Schütze ◽  
E. Fortuna ◽  
D.N. Tsipas ◽  
A. Milewska ◽  
...  
Keyword(s):  
Martensitic Steels ◽  
Diffusion Coatings

scholarly journals Diffusion Coatings as Corrosion Inhibitors

2016 ◽  
Vol 3 (1) ◽  
pp. 40-44
Author(s):  
Radoslav Ivanov ◽  
Tsveteslava Ignatova-Ivanova
Keyword(s):  
Corrosion Resistance ◽  
Diffusion Saturation ◽  
Metal Base ◽  
Diffusion Coatings ◽  
Diffusion Layers ◽  
Steel Container ◽  
Structure Thickness ◽  
Metal Products ◽  
Composition Structure ◽  
Harmful Effects

Abstract Corrosion is the cause of irretrievable loss of huge amounts of metals and alloys. The harmful effects of corrosion can be reduced significantly by applying appropriate methods of corrosion protection. One method to protect metals against corrosion is the formation of diffusion coatings on them. High corrosion resistance is typical for the boride diffusion layers. Aluminothermy is one of the main methods for diffusion saturation of the surface of metal products with various elements, including boron, and under certain conditions with aluminum, too. Samples of steel 45 were put to aluminothermic diffusion saturation with boron in a pressurized steel container at a temperature of 1100K, for 6 hours in powdered aluminothermic mixtures. The content of В2О3 in the starting mixtures decreased from the optimum - 20% to 0%, and the content of Al and the activator - (NH4)2.4BF3 is constant, respectively 7% and 0.5%. Al2O3 was used as filler. The borided samples were tested for corrosion resistance in 10% HCl for 72 hours. The results show that their corrosion resistance depends on the composition of the starting saturating mixture (mainly on the content of В2О3), and respectively on the composition, structure, thickness and degree of adhesion of the layer to the metal base.

Influence of Preliminary Oxidation on the Corrosion Resistance of Ferritic-Martensitic Steels in Lead Melts

2016 ◽  
Vol 51 (6) ◽  
pp. 854-862
Author(s):  
O. I. Yas’kiv ◽  
O. I. Eliseeva ◽  
A. Ya. Kharkhalis ◽  
I. S. Kukhar
Keyword(s):  
Corrosion Resistance ◽  
Martensitic Steels ◽  
Lead Melts

scholarly journals STRUCTURE AND PROPERTIES MULTICOMPONENT BORIDE AND CARBIDE COATINGS FORMED IN MELTS

2020 ◽  
pp. 69-75
Author(s):  
V. A. Teldekov ◽  
L. M. Gurevich
Keyword(s):  
Corrosion Resistance ◽  
Heat Resistance ◽  
Multicomponent Diffusion ◽  
Alloying Elements ◽  
Structure And Properties ◽  
High Quality ◽  
Diffusion Coatings ◽  
Carbide Coatings ◽  
Hcl Solution

High-quality multicomponent diffusion boride and carbide layers on steel 40Cr and 25CrMnTi cemented steel were obtained by processing from 3 to 6 hours at 950 ° C in melts. The melts contained borax and ferroalloy additives. Chrome, vanadium and titanium were alloying elements. Comparative tests of heat resistance and corrosion resistance of diffusion coatings are carried out. Samples with carbide coatings Cr + V and Cr + V + Ti had the highest heat resistance. Samples with a diffusion layer based on iron borides and alloying elements showed the best corrosion resistance during long-term tests in a 10% HCl solution.

Cavitation-corrosion resistance of steel and cast iron with diffusion coatings

1976 ◽  
Vol 10 (6) ◽  
pp. 621-623 ◽  
Author(s):  
V. I. Pokhmurskii ◽  
S. V. Tolstova ◽  
A. P. Milyakov ◽  
G. V. Korotushenko
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Diffusion Coatings
Sign in / Sign up

Export Citation Format

Share Document