Corrosion of AISI 304L (EN 1.4307) stainless steel in animal slurry
PBN-AR
Instytucja
Wydział Mechaniczny (Politechnika Koszalińska)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Journal of Research and Applications in Agricultural Engineering
ISSN
1642-686X
EISSN
Wydawca
Przemysłowy Instytut Maszyn Rolniczych
DOI
Rok publikacji
2014
Numer zeszytu
1
Strony od-do
104-108
Numer tomu
59
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
corrosion
stainless steel
animal slurry
Streszczenia
Język
en
Treść
The stainless steels are used to build parts of machinery for agriculture. These components should have adequate corrosion resistance because they contact with aggressive environments, such as natural and artificial fertilizers, or e.g. during the biogas production. In such environments austenitic AISI 304L (EN 1.4301) and AISI 316L (EN 1.4571) stainless steels are mostly used. In the available literature authors found no information on the corrosion potentiodynamic tests in manure. That was the reason to undertake the studies on one of the austenitic stainless steels to perform corrosion tests in the environment of animal slurry. The article presents the analysis of general and pitting corrosion of AISI 304L (EN 1.4307) steel in the environment which is the cattle slurry. Potentiodynamic measurements were made on the potentiostat ATLAS 98 with a scan rate of 0.1 mV?s-1 in the anodic direction and with scan rate of 1 mV?s-1 in the return cathodic direction. The measurement was started in the anodic direction from potential of minus 600 mV against the saturated calomel electrode (SCE) to achieve a current density of 1000 A?cm-2. After that the cathodic scan was done back to the potential of -600 mV vs. SCE. The general corrosion in animal slurry is higher than in 3% water solution of sodium chloride. The corrosion potential measured in the animal slurry was equal to -525 mV vs. SCE. That clearly indicates a higher tendency to general corrosion in comparison with the results obtained in 3% sodium chloride solution (-200 mV vs. SCE). The passive current density ratio measured in the animal slurry to that one in 3% NaCl aqueous solution is equal approximately 8.5. Key words: corrosion, stainless steel, animal slurry
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
652460