Abstract
The eletroless nickel composite coating was prepared by uniform dispersion of diamond (or PTFE) particles throughout electroless nickel deposition. Corrosion resistance of composite coating in 3.5% NaCl aqueous solution was investigated by electrochemical analysis, dipping test and salt spray test. The results showed that the corrosion resistance of composite coating was inferior to that of electroless nickel coating if small amount of particles was added to the composite coating. Microsturctural analysis by SEM,AES,XRD,and EPMA indicated that the distribution of phosphorus is not homogeneous in the composite coating. The phosphorus_rich region acts as microcathode, however, the phosphorus_lean region acts as microanode.The decrease in corrosion resisthnce may result from the presence of numerous microcells presented in the composite coating.Only when enough amount of particles is included in the composite coating,the protective effect due to inertness of particl is observed.
Keywords
Electroless composite coating, Diamond, PTFE, Corrosion resistance
Publication Date
2001-05-28
Online Available Date
2001-05-28
Revised Date
2001-05-28
Received Date
2001-05-28
Recommended Citation
Tsong-jen YANG, Meng-feng JOU.
Study on Corrosion Resistance of Electroless Nickel Composite Coatings[J]. Journal of Electrochemistry,
2001
,
7(2): 203-209.
DOI: 10.61558/2993-074X.1422
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol7/iss2/3
References
[1] GlemOMallory ,JuanBHajdu .ElectrolessPlating :FundamentalsandApplications,Ch .1andCh .4 [M ].Florida ,AmericanElectroplatersandSurfaceFinishersSociety ,1990 .
[2 ] N .Feldstein ,T .Lancsek ,D .Lindsay ,etal.Electrolesscompositeplating[J].MetalFinishing ,1983Aug .,35.
[3] Lai_GuiYu ,Xu_ShouZhang .ThefrictionandwearpropertiesofelectrolessNi_polytetrafluoroethylenecompos itecoating[J].ThinSolidFilms ,1994 ,98∶2 54.
[4 ] Y .Z .Zhang ,Y .Y .Wu ,K .N .Sun ,etal.CharacterizationofelectrolessNi_PTFEcompositedeposits[J].Jour nalofMaterialsScienceLetters ,1998,119∶17.
[5] M .A .Shoeib ,S .M .Mokhtar ,M .A .AbdEl_Ghaffar .Mechanicalandcorrosionproectionpropertiesofelectro lessnickel_polymercompositecoatings[J].MetalFinishing ,1998,Nov∶58.
[6 ] M .D .Feldstein .Compositeelectrolessnickelcoatingsfortheaerospaceandairlineindustries[J].PlatingsandSurfaceFinishing ,1998,Nov∶2 4 8.
[7] Q .Hong ,G .Yao ,S .Chen .Developmentofironmatrixantifrictioncompositecoatings[J].MetalFinishing ,1998,Oct∶16
[8 ] D .H .Cheng ,W .Y .Xu ,L .Q .Hua .Electrochemicalpreparationandmechanicalpropertiesofamorphousnick el_SiCcomposites[J].PlatingandSurfaceFinishing ,Feb∶6 1.
[9] OvidioA .Leon ,MarianaH .Staia ,HansE .Hintermann .DepositionofNi_P_BN(h)compositeauto_catalyticcoatings[J].SurfaceandCoatingsTechnology ,1998,4 6 1∶10 8_10 9.
[10 ] J .Tang ,T .Huang ,S ,Yao ,S .Zhou .ResearchoncompositecoatingsofmetalsandPTFE[J].PlatingandSurfaceFinishing ,1998,Aug :84 .
[11] I .Appachitei,J,Duszczyk ,L .Katgerman ,etal.ElectrolessNi_Pcompositecoatings∶Theeffectofheattrea mentonthemicrohardnessofsubstrateandcoating[J].ScriptaMaterialia ,19981347:38.
[12 ] Z .A .Hamid ,R .A .El_Adly .Mechanismofnickel_phosphorus_aluminumoxidecompositecoatingsbyelectro lessprocess[J].PlatingandSurfaceFinishing ,1999,May :136 .
[13] G .Straffelini,D .Colombo ,A .Molinari.SurfacedurabilityofelectrolessNi_Pcompostiedeposits[J].Wear ,1999,2 36 :179.
[14] V .V .N .Reddy ,B .Ramamoorthy ,P .KesavanNair.AstudyonthewearresistanceofelectrolessNi_P/dia mondcompositecoatings[J].Wear ,2 0 0 0 ,2 39:111.
[15] 柏宏基 .无电镀镍耐蚀性之研究 [D].台湾 :逢甲大学化工研究所 ,1992
Included in
Engineering Science and Materials Commons, Materials Chemistry Commons, Materials Science and Engineering Commons, Physical Chemistry Commons
