| Title: | Electrochemical assessment of crosslinked self-assembled monolayers of behenic acid for enhanced corrosion protection of bronze and patinated surfaces |
|---|
| Authors: | ID Biljanić, Helena (Author)
ID Markulić, Barbara (Author)
ID Kosec, Tadeja (Author)
ID Mirosavljević, Marija (Author)
ID Desnica, Vladan (Author)
ID Šatović, Domagoj (Author)
ID Kralj, Damir (Author)
ID Marušić, Katarina (Author) |
|---|
| Files: |  URL - Source URL, visit https://doi.org/10.1016/j.porgcoat.2025.109750
 PDF - Presentation file, download (1,32 MB)
MD5: 0B16161B846D781C10C0FFB7AB3553F8
|
|---|
| Language: | English |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
|
|---|
| Abstract: | Bronze sculptures and historical artifacts typically develop natural or artificially induced patinas that enhance aesthetic value and confer some degree of corrosion protection. However, patinated surfaces are vulnerable to environmental degradation, especially due to acid rain, resulting in material loss and impaired visual integrity. Current protective coatings are limited by either environmental or performance constraints. While self-assembled monolayers (SAMs) based on fatty acids such as behenic acid offer potential corrosion protection by forming ultrathin layers on metal surfaces, their long-term effectiveness is compromised by limited chemical stability. This study addresses this critical gap by evaluating the protective effectiveness and durability of SAMs and polymer nanocoatings (PNCs) derived by crosslinking SAMs from behenic acid using gamma irradiation on bare bronze (BB), black sulfide-patinated bronze (BP), and green chloride-patinated bronze (GP) surfaces. The assessment focused primarily on electrochemical performance, using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (Tafel) measurements to evaluate coating stability and corrosion resistance before and after artificial aging. Initial surface characterization employed spectroscopic (FTIR-ATR, Raman spectroscopy), microscopic (SEMEDS, metallography), elemental (X-ray fluorescence), wettability (contact angle goniometry), and visual analyses (colorimetry) to characterize the composition and morphology of the substrates. Distinct structural and chemical differences were identified, with BP characterized primarily by anilite (Cu₇S₄) and GP consisting predominantly of basic copper chlorides (Cu₂(OH)₃Cl), such as atacamite and its isomorphs. Electrochemical analyses demonstrated that while SAM coatings initially reduced corrosion current densities significantly, their protective capability diminished over time due to progressive removal of loosely bound molecules. Conversely, radiation-crosslinked PNC coatings maintained stable corrosion protection over UV-WetDry artificial aging. Minor capacitance increases indicated slight enhancement in surface activity, yet no significant degradation of the crosslinked polymer coating was observed. |
|---|
| Keywords: | bronze, crosslinked protection, electrochemistry |
|---|
| Publication status: | Published |
|---|
| Publication version: | Author Accepted Manuscript |
|---|
| Publication date: | 23.10.2025 |
|---|
| Publisher: | Elsevier |
|---|
| Year of publishing: | 2026 |
|---|
| Number of pages: | str. 1-16 |
|---|
| Numbering: | Vol. 211, [article no.] 109750 |
|---|
| PID: | 20.500.12556/DiRROS-24688  |
|---|
| UDC: | 544.5/.6 |
|---|
| ISSN on article: | 1873-331X |
|---|
| DOI: | 10.1016/j.porgcoat.2025.109750 |
|---|
| COBISS.SI-ID: | 254738435 |
|---|
| Note: |
|
|---|
| Publication date in DiRROS: | 12.12.2025 |
|---|
| Views: | 49 |
|---|
| Downloads: | 22 |
|---|
| Metadata: |    |
|---|
|
:
|
Copy citation |
|---|
| | | | Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
