(福州大學材料系， 福州 350002)
摘 要: 研究了不同成分和結(jié)構(gòu)的Ni-W-P合金鍍層的硬度、 耐蝕性及在液固雙相流中的抗沖刷腐蝕性能， 并對鍍層表面膜進行了XPS分析，結(jié)果表明： 鍍層中鎢含量的增加有利于提高鍍層的硬度、耐蝕性和抗沖刷腐蝕性能。 由Ni(OH)2， WO3，Ni3(PO4)2組成的表面膜具有較強的修復能力， 這是使鍍層具有優(yōu)異抗沖刷腐蝕性能的主要因素之一。 400 ℃以下較低溫度的熱處理提高了鍍層的硬度，但削弱了鍍層的耐蝕性， 然而對抗沖刷腐蝕性能卻略有提高。
關鍵字: 關鍵詞: Ni-W-P鍍層 成分 結(jié)構(gòu) 沖刷腐蝕
（Department of Materials, Fuzhou University, Fuzhou 350002, P. R. China）
Abstract:The microhardness, corrosion and erosion-corrosion resistance of electroless Ni-W-P alloy coatings with different composition and structure in flowing suspension of solid particles in corrosive media were investigated, and the components of the surface film were analyzed by XPS. The results show that increasing tungsten content can raise microhardness, corrosion and erosion-corrosion resistance of electroless Ni-W-P alloy coatings. The surface film made of Ni(OH)2, WO3 , Ni3(PO4)2 possesses well repair ability, which makes electroless Ni-W-P alloy coatings possess excellent erosion-corrosion resistance. Heat treatment below 400 ℃ raises the microhardness, but weakens the corrosion resistance, however it slightly raises erosion-corrosion resistance.
Key words: electroless Ni-W-P alloy coatings composition structure
erosion-corrosion
