Corrosion behavior of thermal-sprayed WC cermet coatings in SO4 2− environment

Rare Metals ◽  
2014 ◽  
Vol 33 (3) ◽  
pp. 318-323 ◽  
Author(s):  
Yan Liu ◽  
Xiao-Min Wang ◽  
Sheng-bo Cen ◽  
Guo-Qing Gou ◽  
Li-Jun Wang ◽  
...  
1995 ◽  
Vol 44 (506) ◽  
pp. 1332-1337
Author(s):  
Mitsuharu INABA ◽  
Kazumi TANI ◽  
Tomoki TOMITA ◽  
Yasuyuki TAKATANI ◽  
Yoshio HARADA

Author(s):  
Leonardo Augusto Luiz ◽  
Juliano de Andrade ◽  
Camila Melo Pesqueira ◽  
Irene Bida de Araújo Fernandes Siqueira ◽  
Gustavo Bavaresco Sucharski ◽  
...  

2013 ◽  
Vol 23 (9) ◽  
pp. 2611-2617 ◽  
Author(s):  
Li-jun WANG ◽  
Pei-xian QIU ◽  
Yan LIU ◽  
Wu-xi ZHOU ◽  
Guo-qing GOU ◽  
...  

2015 ◽  
Vol 819 ◽  
pp. 87-90 ◽  
Author(s):  
Zakiah Kamdi ◽  
C.Y. Phang ◽  
H. Ahmad

Metal-ceramic composite or cermet coatings have become popular due to their enhanced wear and corrosion resistance properties. Cermet consists of ceramic particulate embedded in a metallic binder. WC-Co coatings are often used in applications that require wear resistance, but there are many applications in which thermally sprayed coatings have been deposited on components that operate under both abrasive and corrosive condition. Thus, in this study, the corrosion behavior of WC-12wt%Co in different electrolyte has been evaluated. Electrochemical test has been done in three electrolytes namely 0.5 M hydrochloric acid, HCl, 0.5 M sulfuric acid, H2SO4 and 0.5 M sodium hydroxide, NaOH. It is found that corrosion potential of this coating in acidic environment is more positive compares to in alkaline environment. Both in acid and alkaline electrolyte, binder dissolution were preferential. It may be concluded that this coating have higher corrosion resistance in alkaline electrolyte than in acid electrolyte.


Author(s):  
Ann Chidester Van Orden ◽  
John L. Chidester ◽  
Anna C. Fraker ◽  
Pei Sung

The influence of small variations in the composition on the corrosion behavior of Co-Cr-Mo alloys has been studied using scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDX), and electrochemical measurements. SEM and EDX data were correlated with data from in vitro corrosion measurements involving repassivation and also potentiostatic anodic polarization measurements. Specimens studied included the four alloys shown in Table 1. Corrosion tests were conducted in Hanks' physiological saline solution which has a pH of 7.4 and was held at a temperature of 37°C. Specimens were mechanically polished to a surface finish with 0.05 µm A1203, then exposed to the solution and anodically polarized at a rate of 0.006 v/min. All voltages were measured vs. the saturated calomel electrode (s.c.e.).. Specimens had breakdown potentials near 0.47V vs. s.c.e.


1980 ◽  
Vol 41 (C8) ◽  
pp. C8-862-C8-866
Author(s):  
M. Naka ◽  
K. Hashimoto ◽  
K. Asami ◽  
T. Masumoto

2013 ◽  
Vol 51 (1) ◽  
pp. 033-039
Author(s):  
Hae Woo Lee ◽  
Jae Hyeok Jeon ◽  
Ja Young Hong

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