Evaluation of Al2O3 MOCVD Coating for Titanium Alloys Protection under Severe Conditions at High Temperature

Jean Denis Béguin; Diane Samelor; C. Vahlas; Alain Gleizes; J.A. Petit; B. Sheldon

doi:10.4028/www.scientific.net/MSF.595-598.719

Paper Titles

Mechanism of Catalytic Coke Formation and Some Means to Limit it in Refinery Processes
p.681

Modelling the Development of Type I Hot Corrosion on Coated and Uncoated Single Crystal Superalloys
p.689

Enhanced Internal Oxidation as Reason for Breakdown of Protective Chromia Scales on FeCr-Alloys in Water Vapour Containing Gases
p.699

Cyclic Oxidation of Two FeCrAlRE Foils at 1100 °C - The Influence of the Concentration of Minor Alloying Elements on Scale Microstructure
p.707

Evaluation of Al₂O₃ MOCVD Coating for Titanium Alloys Protection under Severe Conditions at High Temperature
p.719

On the Loss of Protective Scale Formation in Creep-Resistant, Alumina-Forming Austenitic Stainless Steels at 900°C in Air
p.725

Effect of Lanthanum Sol-Gel Coating on the Oxidation Behaviour of the AISI 304 Steel at 1000°C
p.733

High Temperature Corrosion of the Si-Mo Cast Iron in Exhaust Atmosphere
p.743

On the Effect of Surface Treatment to Improve Oxidation Resistance and Conductivity of Metallic Interconnects for SOFC in Operating Conditions
p.753

HomeMaterials Science ForumMaterials Science Forum Vols. 595-598Evaluation of Al2O3 MOCVD Coating for Titanium...

Evaluation of Al₂O₃ MOCVD Coating for Titanium Alloys Protection under Severe Conditions at High Temperature

Abstract:

The corrosion resistance of MOCVD Al2O3 coating system was investigated to protect a TA6V Alloy under hot salt corrosion conditions: This coating was corroded with a salt deposit without mechanical loading at 480°C during 100 h. Corrosion products formed in salted areas were studied by Energy Dispersive Spectroscopy (EDS). Although all coated specimens were damaged with corrosion products presence in salted area, Al2O3 coatings showed the lowest salt damage on titanium substrate after a metallographic cross section observation compared to uncoated ones. As well as these interesting experimental results, coated specimens exhibit a good adherence on titanium substrate