The effect of coating drying conditions on bronze corrosion protection
Waterborne coatings present a green alternative to solvent-borne coatings as only a small amount of organic solvent is released into the environment during drying. However, for waterborne coatings, the drying process is much more challenging due to the slow evaporation of water. In this work, the i...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
International Association of Physical Chemists (IAPC)
2024-02-01
|
| Series: | Journal of Electrochemical Science and Engineering |
| Subjects: | |
| Online Access: | https://pub.iapchem.org/ojs/index.php/JESE/article/view/2228 |
| _version_ | 1797311630028046336 |
|---|---|
| author | Helena Otmačić Ćurković Angela Kapitanović Martina Filipović Petra Gorišek |
| author_facet | Helena Otmačić Ćurković Angela Kapitanović Martina Filipović Petra Gorišek |
| author_sort | Helena Otmačić Ćurković |
| collection | DOAJ |
| description |
Waterborne coatings present a green alternative to solvent-borne coatings as only a small amount of organic solvent is released into the environment during drying. However, for waterborne coatings, the drying process is much more challenging due to the slow evaporation of water. In this work, the influence of drying temperature on the protective properties of a waterborne acrylic coating was studied. Its performance in corrosion protection of bronze substrates, representing the bronzes used for the sculptures placed outdoors, was examined. Corrosion properties were evaluated by linear polarization measurements and electrochemical impedance spectroscopy during three-week exposure to artificial acid rain solution. It was found that drying at ambient temperature resulted in modest corrosion protection, while drying at 55 °C ensured greater initial corrosion resistance, which gradually degraded during exposure to acid rain solution accompanied by the coating blistering. Drying of one-layer coating at 40 °C resulted in the formation of clearly visible corrosion products. If the coating was applied in three layers, the drying process was more efficient, leading to slightly higher polarization resistance values without visible corrosion at the bronze surface. Furthermore, the studied waterborne acrylic coating provided good corrosion protection of patinated bronze surfaces. Additionally, it was found that for efficient corrosion protection, it is preferable that the coating contains a corrosion inhibitor in order to avoid substrate corrosion during coating drying. When applied properly, studied coating does not alter the state of surfaces, both bare and patinated, which is important for its application in bronze cultural heritage protection.
|
| first_indexed | 2024-03-08T02:03:27Z |
| format | Article |
| id | doaj.art-200e1d8dcdc6456a8564bb7a2bac8f08 |
| institution | Directory Open Access Journal |
| issn | 1847-9286 |
| language | English |
| last_indexed | 2024-03-08T02:03:27Z |
| publishDate | 2024-02-01 |
| publisher | International Association of Physical Chemists (IAPC) |
| record_format | Article |
| series | Journal of Electrochemical Science and Engineering |
| spelling | doaj.art-200e1d8dcdc6456a8564bb7a2bac8f082024-02-14T02:50:22ZengInternational Association of Physical Chemists (IAPC)Journal of Electrochemical Science and Engineering1847-92862024-02-0110.5599/jese.2228The effect of coating drying conditions on bronze corrosion protectionHelena Otmačić Ćurković0Angela Kapitanović1Martina Filipović2Petra Gorišek3University of Zagreb Faculty of Chemical Engineering and Technology, Research Laboratory for Corrosion Engineering and Surface Protection, Savska 16, HR 10000 Zagreb, Croatia University of Zagreb Faculty of Chemical Engineering and Technology, Research Laboratory for Corrosion Engineering and Surface Protection, Savska 16, HR 10000 Zagreb, Croatia University of Zagreb Faculty of Chemical Engineering and Technology, Research Laboratory for Corrosion Engineering and Surface Protection, Savska 16, HR 10000 Zagreb, Croatia University of Zagreb Faculty of Chemical Engineering and Technology, Research Laboratory for Corrosion Engineering and Surface Protection, Savska 16, HR 10000 Zagreb, Croatia Waterborne coatings present a green alternative to solvent-borne coatings as only a small amount of organic solvent is released into the environment during drying. However, for waterborne coatings, the drying process is much more challenging due to the slow evaporation of water. In this work, the influence of drying temperature on the protective properties of a waterborne acrylic coating was studied. Its performance in corrosion protection of bronze substrates, representing the bronzes used for the sculptures placed outdoors, was examined. Corrosion properties were evaluated by linear polarization measurements and electrochemical impedance spectroscopy during three-week exposure to artificial acid rain solution. It was found that drying at ambient temperature resulted in modest corrosion protection, while drying at 55 °C ensured greater initial corrosion resistance, which gradually degraded during exposure to acid rain solution accompanied by the coating blistering. Drying of one-layer coating at 40 °C resulted in the formation of clearly visible corrosion products. If the coating was applied in three layers, the drying process was more efficient, leading to slightly higher polarization resistance values without visible corrosion at the bronze surface. Furthermore, the studied waterborne acrylic coating provided good corrosion protection of patinated bronze surfaces. Additionally, it was found that for efficient corrosion protection, it is preferable that the coating contains a corrosion inhibitor in order to avoid substrate corrosion during coating drying. When applied properly, studied coating does not alter the state of surfaces, both bare and patinated, which is important for its application in bronze cultural heritage protection. https://pub.iapchem.org/ojs/index.php/JESE/article/view/2228Waterborne coatingsdrying temperatureelectrochemical impedance spectroscopypolarization measurements |
| spellingShingle | Helena Otmačić Ćurković Angela Kapitanović Martina Filipović Petra Gorišek The effect of coating drying conditions on bronze corrosion protection Journal of Electrochemical Science and Engineering Waterborne coatings drying temperature electrochemical impedance spectroscopy polarization measurements |
| title | The effect of coating drying conditions on bronze corrosion protection |
| title_full | The effect of coating drying conditions on bronze corrosion protection |
| title_fullStr | The effect of coating drying conditions on bronze corrosion protection |
| title_full_unstemmed | The effect of coating drying conditions on bronze corrosion protection |
| title_short | The effect of coating drying conditions on bronze corrosion protection |
| title_sort | effect of coating drying conditions on bronze corrosion protection |
| topic | Waterborne coatings drying temperature electrochemical impedance spectroscopy polarization measurements |
| url | https://pub.iapchem.org/ojs/index.php/JESE/article/view/2228 |
| work_keys_str_mv | AT helenaotmaciccurkovic theeffectofcoatingdryingconditionsonbronzecorrosionprotection AT angelakapitanovic theeffectofcoatingdryingconditionsonbronzecorrosionprotection AT martinafilipovic theeffectofcoatingdryingconditionsonbronzecorrosionprotection AT petragorisek theeffectofcoatingdryingconditionsonbronzecorrosionprotection AT helenaotmaciccurkovic effectofcoatingdryingconditionsonbronzecorrosionprotection AT angelakapitanovic effectofcoatingdryingconditionsonbronzecorrosionprotection AT martinafilipovic effectofcoatingdryingconditionsonbronzecorrosionprotection AT petragorisek effectofcoatingdryingconditionsonbronzecorrosionprotection |