Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions
Formation of natural patina on copper and copper alloys objects takes tens of years. There are solutions for patination, which are used in restorers’ practice. However, these artificial patinas are usually based on nitrates, carbonates or chlorides. Patina based on brochantite is the most stable pha...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | ces |
| Published: |
Sciendo
2020-10-01
|
| Series: | Koroze a Ochrana Materialu |
| Online Access: | https://doi.org/10.2478/kom-2020-0014 |
| id |
doaj-2173b8c209be443dae1f0429fe3385b4 |
|---|---|
| record_format |
Article |
| spelling |
doaj-2173b8c209be443dae1f0429fe3385b42021-09-05T21:02:09ZcesSciendoKoroze a Ochrana Materialu1804-12132020-10-01643959910.2478/kom-2020-0014kom-2020-0014Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensionsBureš R.0Rak P.1Stoulil J.2Department of Metals and Corrosion Engineering, University of Chemistry and Technology PragueDepartment of Metals and Corrosion Engineering, University of Chemistry and Technology PragueDepartment of Metals and Corrosion Engineering, University of Chemistry and Technology PragueFormation of natural patina on copper and copper alloys objects takes tens of years. There are solutions for patination, which are used in restorers’ practice. However, these artificial patinas are usually based on nitrates, carbonates or chlorides. Patina based on brochantite is the most stable phase under atmospheric conditions. This type of patina was successfully formed in laboratory in a small exposure chamber with higher content of SO2. This work is next step of the experiment to make this method become more practicable. It started with construction 2 m3 exposure chamber and simulation of ideal conditions for patination process. The length of drying phase, homogeneity of conditions, pH of feeding water, colour of patina, placement of samples and final appearance were observed. The chamber construction allows to achieve ideal pH value of feeding water, samples surface became dry during the ventilation and temperature during condensation was stable at 40 °C. These conditions are ideal for patination process.https://doi.org/10.2478/kom-2020-0014 |
| collection |
DOAJ |
| language |
ces |
| format |
Article |
| sources |
DOAJ |
| author |
Bureš R. Rak P. Stoulil J. |
| spellingShingle |
Bureš R. Rak P. Stoulil J. Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions Koroze a Ochrana Materialu |
| author_facet |
Bureš R. Rak P. Stoulil J. |
| author_sort |
Bureš R. |
| title |
Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions |
| title_short |
Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions |
| title_full |
Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions |
| title_fullStr |
Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions |
| title_full_unstemmed |
Testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions |
| title_sort |
testing of pilot 2 m3 exposure chamber for formation of brochantite based patina on copper and copper alloys – objects of practical dimensions |
| publisher |
Sciendo |
| series |
Koroze a Ochrana Materialu |
| issn |
1804-1213 |
| publishDate |
2020-10-01 |
| description |
Formation of natural patina on copper and copper alloys objects takes tens of years. There are solutions for patination, which are used in restorers’ practice. However, these artificial patinas are usually based on nitrates, carbonates or chlorides. Patina based on brochantite is the most stable phase under atmospheric conditions. This type of patina was successfully formed in laboratory in a small exposure chamber with higher content of SO2. This work is next step of the experiment to make this method become more practicable. It started with construction 2 m3 exposure chamber and simulation of ideal conditions for patination process. The length of drying phase, homogeneity of conditions, pH of feeding water, colour of patina, placement of samples and final appearance were observed. The chamber construction allows to achieve ideal pH value of feeding water, samples surface became dry during the ventilation and temperature during condensation was stable at 40 °C. These conditions are ideal for patination process. |
| url |
https://doi.org/10.2478/kom-2020-0014 |
| work_keys_str_mv |
AT buresr testingofpilot2m3exposurechamberforformationofbrochantitebasedpatinaoncopperandcopperalloysobjectsofpracticaldimensions AT rakp testingofpilot2m3exposurechamberforformationofbrochantitebasedpatinaoncopperandcopperalloysobjectsofpracticaldimensions AT stoulilj testingofpilot2m3exposurechamberforformationofbrochantitebasedpatinaoncopperandcopperalloysobjectsofpracticaldimensions |
| _version_ |
1717781226669998080 |