Hot corrosion behavior and near-surface microstructure of a "low-temperature high-activity Cr-aluminide" coating on inconel 738LC exposed to Na2SO4, Na2SO4 + V2O5 and Na2SO4 + V2O5 + NaCl at 900 °C

被引：35

作者：

Doolabi, M. Salehi ^{[1
]}

Ghasemi, B. ^{[1
]}

Sadrnezhaad, S. K. ^{[2
]}

Habibollahzadeh, A. ^{[1
]}

Jafarzadeh, K. ^{[3
]}

机构：

[1] Semnan Univ, Fac Mat Sci & Engn, POB 35131-19111, Semnan, Iran

[2] Sharif Univ Technol, Dept Mat Sci & Engn, Azadi Ave,POB 11365-9466, Tehran, Iran

[3] Maleke Ashtar Univ Technol, Mat Dept, Tehran, Iran

来源：

CORROSION SCIENCE | 2017年 / 128卷

关键词：

Metal coating; Superalloys; Molten salts; Hot corrosion; CYCLIC OXIDATION BEHAVIOR; NI-BASED SUPERALLOY; BASE SUPERALLOY; NICKEL; ALLOYS; ENVIRONMENT;

D O I：

10.1016/j.corsci.2017.09.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hot corrosion is a serious problem in gas turbines due to poor quality fuels which contain Na, V, S and Cl. To resolve the problem, Cr-aluminide was coated on IN-738LC superalloy with a two steps pack cementation process. Oxidation behavior and near-surface microstructure of the coating showed consecutive increase in destruction by exposition to Na2SO4, 75Na(2)SO(4) + 25 V2O5 and 70Na(2)SO(4) + 25 V2O5 + 5NaCl (wt.%). Kinetic studies indicated parabolic corrosion rate in salt-less samples due to diffusion. Similar expression for salt-covered samples was assessed for oxide dissolution. Plate-like, broken-plate-like and cauliflower-like morphologies attributed to the corrosion products were observed after exposition to above three salts, respectively.

引用

页码：42 / 53

页数：12

共 50 条

[31] Hot Corrosion Behavior of CM 247 LC Alloy in Na2SO4 and NaCl Environments
I. Gurrappa
Oxidation of Metals, 1999, 51 : 353 - 382
[32] HOT CORROSION OF POTENTIAL THERMAL BARRIER COATING MATERIAL (SM1-XYBX)2ZR2O7 BY V2O5 AND NA2SO4
Ouyang, Jia-Hu
Li, Sa
Liu, Zhan-Guo
Zhou, Yu
ADVANCED CERAMIC COATINGS AND MATERIALS FOR EXTREME ENVIRONMENTS, 2011, 32 : 109 - 128
[33] Preparation, characterization, electrical conductivity and dielectric studies of Na2SO4 and V2O5 composite solid electrolytes
Iqbal, Mohd Zafar
Rafiuddin
MEASUREMENT, 2016, 81 : 102 - 112
[34] Comparison of Na2SO4, K2SO4 and Na2SO4-K2SO4 deposit induced hot corrosion of a β-NiAl coating
Wang, Yaping
Pillai, Rishi
Yazhenskikh, Elena
Frommherz, Martin
Mueller, Michael
Quadakkers, Willem Joseph
Naumenko, Dmitry
CORROSION SCIENCE, 2022, 198
[35] Hot corrosion behavior of dense CYSZ/YSZ bilayer coatings deposited by atmospheric plasma spray in Na2SO4 + V2O5 molten salts
de la Roche, Jhonattan
Alvarado-Orozco, Juan Manuel
Gomez, Pablo Andres
Cano, Irene Garcia
Dosta, Sergi
Toro, Alejandro
SURFACE & COATINGS TECHNOLOGY, 2022, 432
[36] Grain size dependant high-temperature hot corrosion (HTHC) degradation behavior in Alloy 617 during exposure in Na2SO4 + NaCl + V2O5 salt mixture
Bhuyan, P.
Sanyal, S.
Mitra, R.
JOURNAL OF ALLOYS AND COMPOUNDS, 2022, 914
[37] Evolution of Microstructures on GTA Welded AISI304 subjected to hot corrosion at 700°C under Na2SO4 + V2O5 (60%)
Sharief, Hafeez B.
Kumar, Senthil S.
Yeshwanth, B. K.
Arivazhagan, N.
Ramkumar, Devendranath K.
Narayanan, S.
ADVANCED STRUCTURAL AND FUNCTIONAL MATERIALS FOR PROTECTION, 2012, 185 : 84 - 86
[38] Investigation of the effect of V2O5 and Na2SO4 melted salts on thermal barrier coatings under cyclic conditions
Ozgurluk, Yasin
Doleker, Kadir Mert
Karaoglanli, Abdullah Cahit
ANTI-CORROSION METHODS AND MATERIALS, 2019, 66 (05) : 644 - 650
[39] LMM AUGER SPECTRA OF SULFUR IN NA2SO4 AND NA2S2O5
FARRELL, HH
SURFACE SCIENCE, 1973, 34 (02) : 456 - 470
[40] Hot Corrosion Behaviour of HVOF Sprayed (Cr3C2–35 % NiCr) + 5 % Si Coatings in the Presence of Na2SO4–60 % V2O5 at 700 °C
B. Somasundaram
Ravikiran Kadoli
M. R. Ramesh
Transactions of the Indian Institute of Metals, 2015, 68 : 257 - 268

← 1 2 3 4 5 →