Modified manganese phosphate conversion coating on low-carbon steel

Jakub Duszczyk , Katarzyna Siuzdak , Tomasz Klimczuk , Judyta Strychalska-Nowak , Adriana Zaleska-Medynska


Conversion coatings are one of the primary types of galvanic coatings used to protect steel structures against corrosion. They are created through chemical reactions between the metal surface and the environment of the phosphating. This paper investigates the impact that the addition of new metal cations to the phosphating reaction environment has on the quality of the final coating. So far, standard phosphate coatings have contained only one primary element, such as zinc in the case of zinc coatings, or two elements, such as manganese and iron in the case of manganese coatings. The structural properties have been determined using a scanning electron microscope (SEM), X-ray diffraction (XRD), and electrochemical tests. New manganese coatings were produced through a reaction between the modified phosphating bath and the metal (Ba, Zn, Cd, Mo, Cu, Ce, Sr, and Ca). This change was noticeable in the structure of the produced manganese phosphate crystallites. A destructive effect of molybdenum and chromium was demonstrated. Microscopic analysis, XRD analysis and electrochemical tests suggest that the addition of new metal cations to the phosphating bath affects the corrosion resistance of the modified coating.
Author Jakub Duszczyk (FCh / DET / LPh)
Jakub Duszczyk,,
- Laboratory of Photocatalysis
, Katarzyna Siuzdak
Katarzyna Siuzdak,,
, Tomasz Klimczuk
Tomasz Klimczuk,,
, Judyta Strychalska-Nowak
Judyta Strychalska-Nowak,,
, Adriana Zaleska-Medynska (FCh / DET / LPh)
Adriana Zaleska-Medynska,,
- Laboratory of Photocatalysis
Journal seriesMaterials, ISSN 1996-1944, (N/A 140 pkt)
Issue year2020
Publication size in sheets1.15
Article number1416
Keywords in Englishphosphating, corrosion, modified manganese coatings, manganese phosphating coatings, surface protection, conversion coatings, XRD
ASJC Classification2500 General Materials Science
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 23-03-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.285; WoS Impact Factor: 2018 = 2.972 (2) - 2018=3.532 (5)
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