Thermal studies on electrodeposited black oxide coating on magnesium alloys
| Autor: | Anand Kumar Sharma, R. Uma Rani, S.M. Mayanna |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Magnesium Inorganic chemistry technology industry and agriculture Oxide chemistry.chemical_element Condensed Matter Physics Black oxide Thermogravimetry chemistry.chemical_compound Differential scanning calorimetry chemistry Chemical engineering Magnesium chromate Physical and Theoretical Chemistry Magnesium alloy Thermal analysis Instrumentation |
| Zdroj: | Thermochimica Acta. 376:67-75 |
| ISSN: | 0040-6031 |
| Popis: | Thermal behavior of black anodic coatings on magnesium alloy, AZ31B and magnesium lithium alloy, MLA 9 has been investigated. The chemical nature of coating is characterized by infrared spectral studies. The thermoanalytical investigations have been carried out using thermogravimetry (TG), derivative thermogravimetry (DTG), and differential scanning calorimetry (DSC). The decomposition proceeds through three steps viz., dehydration, decomposition of chromium hydroxide and sulphate and decomposition of magnesium chromate to oxide. Measurement of hemispherical emittance of coatings verses temperature was investigated using calorimetric methods. The studies revealed that the thermal emittance of coatings increases with temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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