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A mineral insulation oil containing 500 mg/l dibenzyl disulfide (DBDS) was aged under different thermal (105 °C to 165 °C) and atmospheric (nitrogen and air) conditions to further understand the reaction mechanism of corrosive sulfur with copper. The DBDS concentration of each oil sample was measured using high-performance liquid chromatography (HPLC), and the change in the color of each oil and copper...
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