Investigation of Na2SO4 Deposit Induced Corrosion of Cr, Al, C Binary and Ternary Thin Film Coatings on Ni-201. Issue 6 (1st January 2017)

• Record Type: Journal Article
• Authors: Aw, Lik Ming; Amendola, Roberta; Ryter, John W.; McCleary, Madisen W.; Gannon, Paul E.; Leonard, McLain E.; Smialek, James L.
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 6(2017)
• Page Start: C218
• Page End: C223
• Publication Date: 2017-01-01
• Subjects: High Temperature Corrosion -- Magnetron Sputtering -- Nickel -- Oxidation -- Thin Films; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0411706jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Al-C, Cr-C, Al-Cr and Al-Cr-C thin film coatings were sputtered onto Ni-201 substrates. Samples were deposited with 1.0 ± 0.3 mg cm −2 Na2 SO4 and exposed to dry air/2 ppm SO2 gas atmosphere, at 700°C for 250 hours. Coated samples had reduced corrosion rates relative to uncoated samples. Al–C and Cr–C coatings were not effective since NiO was the only compound detected on the surfaces; in contrast Cr–Al and Cr–Al–C developed protective layers of Al2 O3 and Cr2 O3 with Cr–Al–C coated samples having the least corrosion rate.