Historical processes of chemical blackening of steel and their corrosion resistance

This study focuses on the evaluation of historical acid blackening of steel in terms of their applicability to historical objects, such as tin-soldered multi-barrelled firearms, where the alkaline bath blackening method cannot be used. The acid blackening method was also compared with the alkaline h...

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Published inKorose a ochrana materiálu Vol. 68; no. 1; pp. 63 - 71
Main Authors Rapouch, Karel, Trčka, Josef, Selucká, Alena, Foret, Lukáš
Format Journal Article
LanguageEnglish
Published Prague Sciendo 01.03.2024
De Gruyter Poland
Subjects
Acid resistance
Acids
Blackening
Cold
Corrosion resistance
Corrosion resistant steels
Corrosion tests
Electrochemical impedance spectroscopy
Electrode polarization
Firearms
Low carbon steel
Low carbon steels
Preservatives
Surface treatment
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Summary:This study focuses on the evaluation of historical acid blackening of steel in terms of their applicability to historical objects, such as tin-soldered multi-barrelled firearms, where the alkaline bath blackening method cannot be used. The acid blackening method was also compared with the alkaline hot bath blackening method used nowadays, both on the conversion layer itself and in combination with a preservative agent. The procedures were tested on low carbon steel samples and fragments of damaged historic steel barrels. The quality of the surface treatment was evaluated both in terms of visual appearance and corrosion resistance. The corrosion properties were evaluated both by a condensation chamber test and by electrochemical methods such as polarization resistance measurements or electrochemical impedance spectroscopy.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:1804-1213
0452-599X
1804-1213
DOI:10.2478/kom-2024-0007