Effects of sealing on corrosion behaviour of plasma-sprayed Cr2O3-8TiO2 coating

被引：26
作者：
Zhang, Jingjing [1 ]
Wang, Zehua [1 ]
Lin, Pinghua [2 ]
机构：
[1] Hohai Univ, Coll Mech & Mat, Nanjing 210098, Jiangsu, Peoples R China
[2] Huazhong Univ Sci & Technol, Wuhan 430078, Peoples R China
来源：
SURFACE ENGINEERING | 2013年 / 29卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Coating; Plasma-sprayed; Sealing; Corrosion; THERMAL BARRIER COATINGS; CERAMIC COATINGS; ALUMINA COATINGS; WEAR-RESISTANCE; OXIDE COATINGS; ENVIRONMENTS;
D O I：
10.1179/1743294413Y.0000000161
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Plasma-sprayed Cr2O3-8 wt-% TiO2 coatings were deposited on mild steel and sealed by epoxy resin and silicone resin in different processes. The microstructure and corrosion resistance of all coatings were investigated. The results showed that silicone resin sealant can seal the coating well and 91% of interconnected porosity was blocked. The sealant can penetrate into the coating by more than 280 mu m. The coating sealed with silicone resin in vacuum conditions had the highest corrosion potential E-corr (-375 mV) and lowest corrosion current density i(corr) (17 mA m(-2)) in electrochemical tests. Correspondingly, the unsealed coating had the lowest E-corr and highest i(corr). The corrosion resistance of the coatings was in the following order: coating sealed with silicone resin in vacuum>coating sealed with silicone resin in air. coating sealed with epoxy resin in vacuum>coating sealed with epoxy resin in air. unsealed coating.
引用
收藏
页码：594 / 599
页数：6
相关论文
共 21 条
  • [1] Improved sealing treatments for thick thermal barrier coatings
    Ahmaniemi, S
    Vuoristo, P
    Mäntylä, T
    [J]. SURFACE & COATINGS TECHNOLOGY, 2002, 151 : 412 - 417
  • [2] Influence of a sealing treatment on the behavior of plasma-sprayed alumina coatings operating in extreme environments
    Berard, Geoffroy
    Brun, Patrice
    Lacombe, Jacques
    Montavon, Ghislain
    Denoirjean, Alain
    Antou, Guy
    [J]. JOURNAL OF THERMAL SPRAY TECHNOLOGY, 2008, 17 (03) : 410 - 419
  • [3] Plasma sprayed ceramic coatings without and with epoxy resin sealing treatment and their wear resistance
    Ctibor, P.
    Neufuss, K.
    Zahalka, F.
    Kolman, B.
    [J]. WEAR, 2007, 262 (9-10) : 1274 - 1280
  • [4] Characterisation and corrosion properties of novel hydroxyapatite niobium plasma sprayed coating
    Enayati, M. H.
    Fathi, M. H.
    Zomorodian, A.
    [J]. SURFACE ENGINEERING, 2009, 25 (04) : 338 - 342
  • [5] Feasibility of ceramic coating to guard stainless steels against intergranular corrosion
    Ghosh, S.
    Roychowdhury, S.
    Kain, V.
    Sharma, B. P.
    Padmanabhan, P. V. A.
    Ray, K. K.
    [J]. SURFACE ENGINEERING, 2008, 24 (06) : 429 - 435
  • [6] Influence of aqueous aging on surface properties of plasma sprayed oxide coatings
    Harju, Mika
    Halme, Johanna
    Jarn, Mikael
    Rosenholm, Jarl B.
    Mantyla, Tapio
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2007, 313 (01) : 194 - 201
  • [7] High temperature oxidation of plasma and HVOF thermal sprayed CoNiCrAlY coatings in simulated gas turbine and furnace environments
    Higuero, V.
    Belzunce, F. J.
    Riba, J.
    [J]. SURFACE ENGINEERING, 2009, 25 (04) : 319 - 325
  • [8] Slurry erosion properties of detonation sprayed and plasma sprayed coatings for materials used in mining environments
    Kennedy, Z. E.
    Natarajan, S.
    [J]. SURFACE ENGINEERING, 2009, 25 (06) : 476 - 481
  • [9] The effects of sealing on the mechanical properties of the plasma-sprayed alumina-titania coating
    Kim, HJ
    Lee, CH
    Kweon, YG
    [J]. SURFACE & COATINGS TECHNOLOGY, 2001, 139 (01) : 75 - 80
  • [10] Sealing of thermal spray coatings by impregnation
    Knuuttila, J
    Sorsa, P
    Mäntylä, T
    [J]. JOURNAL OF THERMAL SPRAY TECHNOLOGY, 1999, 8 (02) : 249 - 257
123