K52合金及其涂层的涂盐热腐蚀行为

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名

邮箱

手机号码

标题

留言内容

验证码

Hot Corrosion Behavior of Cast K52 Alloy and Its Sputtered Coating

摘要: 研究了合金及其涂层的热腐蚀行为,测定了它们的氧化动力学曲线。用扫描电镜和电子探针观察了合金及涂层腐蚀后的表面形貌和横截面显微组织。结果表明:溅射K52纳米晶涂层在含有NaCl的盐中腐蚀10 h,氧化膜就大面积剥落,涂层遭受很大的破坏。而铸态合金腐蚀50 h后,产生已基本连续的内氧化铝层,这层氧化铝对阻止O、S和Cl的进入起到一定的作用,提高了合金的抗氯盐腐蚀。
- 热腐蚀 /
- 溅射纳米晶 /
- 涂层
Abstract: Hot corrosion resistance of cast alloy K52 and its coating specimens were studied.The oxidation kinetics of the alloys was measured.Scan electron microscopy(SEM)was used to exam the surface morphology and cross-section views of the eroded specimens,and the electro-probe were also adopted to characterize the compositions of corrosion products and distribution of elements on the cross-section.The results indicated that the nanocrystalline coating was destroyed with pre-deposits of 75%Na₂SO₄+25%NaCl for 10h.A continuous inner scale of Al₂O₃ formed on the cast alloy after hot corrosion for 50h.The scale inhibits O,S and Cl entering into alloy.
- Hot corrosion /
- Sputtered nanocrystalline /
- Coating

[1]	Wang F,Lou H,Bai L,et al.Magnetron sputteredCoCrAlY coatings on superalloy IN738[J].Met SciTech,1990,6:61-65.
[2]	Tang Zhaolin,Wang Fuhui,Wu Weitao.Effect of a sput-tered TiAlCr coating on oxidationresistance of tiAl inter-metallics[J].Oxid Met,1997,48:511-525.
[3]	Nicholls J B,Hurst R C,Hancock P.The mechanicalproperties of surface scales on nickel-base superalloysⅡcontaminant corrosion[J].Corr Sci,1978,18(6):543-571.
[4]	Shores D A,Luthra K L.The effect of SO2and NaCl onhightemperature hot corrosion[J].J Electrochem Soc,1978,125:411-419.