Influence of Salt Coating on Hot Corrosion Behavior of Co-Cr Alloy
Abstract:The hot corrosion behavior of Co-10Cr and Co-10Cr-5Al alloys with different coating weight (2–2.5 mg/cm2 and 4–4.5 mg/cm2 of 25%K2SO4 + 75%Na2SO4 was studied at 900 °C for 24 h in air. Results show that for both of the alloys, the mass gain of the alloy coated with 2–2.5 mg/cm2 of 25%K2SO4 + 75%Na2SO4 is greater than that of the alloy coated with 4–4.5 mg/cm2 of 25%K2SO4 + 75%Na2SO4. And correspondingly, the corrosion products layer of two alloys with the coating weight of 2–2.5 mg/cm2 is thicker than that with coating weight of 4–4.5 mg/cm2. The abnormal phenomenon is also briefly discussed.
Document Type: Research Article
Publication date: 2011-11-01
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