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Citation:
　Sahil Julka,Mohd Imran Ansari,Dineshsingh G. Thakur.Effect of pH on Mechanical, Physical and Tribological Properties of Electroless Ni-P-Al2O3 Composite Deposits for Marine Applications[J].Journal of Marine Science and Application,2016,(4):484-492.[doi:10.1007/s11804-016-1385-3]
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Effect of pH on Mechanical, Physical and Tribological Properties of Electroless Ni-P-Al2O3 Composite Deposits for Marine Applications

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Title:
Effect of pH on Mechanical, Physical and Tribological Properties of Electroless Ni-P-Al2O3 Composite Deposits for Marine Applications
Author(s):
Sahil Julka;  Mohd Imran Ansari;  Dineshsingh G. Thakur
Affilations:
Author(s):
Sahil Julka;  Mohd Imran Ansari;  Dineshsingh G. Thakur
Department of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Pune-411025, India
Keywords:
ENi-P-Al2O3|composite deposits|pH|microhardness|surface roughness|deposition rate|wettability|wear resistance|corrosion resistance
分类号:
-
DOI:
10.1007/s11804-016-1385-3
Abstract:
Successful co-deposition of fine particulate matter within an Electroless Nickel-Phosphorous (ENi-P) matrix is dependent on various factors like bath composition, particle compatibility with metallic matrix, bath reactivity (pH), particle size and their distribution. ENi-P deposits incorporating Al2O3/ Alumina in a disperse phase have varied effects on properties and attributes like surface roughness (Ra), microhardness, wear resistance, corrosion resistance and surface morphology of the deposits obtained. This paper experimentally investigates the effect of alumina (1.55 g/L) on Ra, microhardness, surface morphology, deposition rate, wettability, wear resistance and corrosion resistance of ENi-P-Al2O3 composite deposits on mild steel substrates at bath pH 5, 7 and 9. Study reveals that optimum deposit parameters and deposition rates are achieved with bath pH. However, not much study has been undertaken concerning composite deposits obtained from higher bath pH or basic bath. This is attributable to the fact that at higher bath pH or alkaline baths, the bath gets unstable and eventually degrades or decomposes, thereby resulting in sub optimal or poor deposition. Hence, experimental investigations carried out by preparing suitable baths, operating under optimum conditions, and enabling successful composite deposition in acidic and alkaline baths have revealed that there is a significant improvement in the above mentioned properties of the as-deposited composite deposits, as the pH is increased from pH 5 to pH 9. This aspect can therefore be advantageously utilized for preparing various marine components like fasteners, nuts, bolts, washers, pipes, cables, components having relative motion etc.

References:

Aal AA, Zaki ZI, Hamid ZA, 2007. Novel composite coatings containing (TiC–Al2O3) powder. Materials Science and Engineering, 447(1-2), 87-94.
DOI: 10.1016/j.msea.2006.10.036
Alirezaei SH, Monirvaghefi SM, Salehi M, Saatchi A, 2004. Effect of alumina content on surface morphology and hardness of Ni–P–Al2O3 electroless composite coatings. Surface and Coatings Technology, 184(2-3), 170-175.
DOI: 10.1016/j.surfcoat.2003.11.013
Apachitei I, Duszczyk J, Katgerman L, Overkamp PJB, 1998. Particles co-deposition by electroless nickel. Scripta Materialia, 38(9), 1383-1389.
DOI: 10.1016/S1359-6462(98)00053-0
Athauda TJ, Decker DS, Ozer RR, 2012. Effect of surface metrology on the wettability of SiO2 nanoparticle coating. Materials Letters, 67(1), 338-341.
DOI: 10.1016/j.matlet.2011.09.100
Balaraju JN, Kalavatib, Rajam KS, 2006. Influence of particle size on the microstructure, hardness and corrosion resistance of electroless Ni–P–Al2O3 composite coatings. Surface & Coatings Technology, 200(12-13), 3933-3941.
DOI: 10.1016/j.surfcoat.2005.03.007
Balaraju JN, Sankara TSN, Seshadri SK, 2003. Electroless Ni–P composite coatings. Journal of Applied Electrochemistry, 33(9), 807-816.
DOI: 10.1023/A;1025572410205
Balaraju JN, Seshadri SK, 1999. Preparation and characterization of electroless Ni-P and Ni-P-Si composite coatings. Transactions of the Institute of Metal Finishing, 77(2), 84-86.
Baudrand DW, 1994. Electroless Nickel plating, surface engineering. ASM Hand Book, Vol. 5. American Society for Materials, Material Park, 290.
Campestrini P, Westing EPM, Hovestad A, De Wit JHW 2002. Investigation of the chromate conversion coating on Alclad 2024 aluminium alloy: effect of the pH of the chromate bath. Electrochimica Acta, 47(7), 1097-1113.
DOI: 10.1016/S0013-4686(01)00818-0
Dervos CT, Novakovic J, Vassiliou P, 2004. Electroless Ni-B and Ni-P coatings with high fretting resistance for electrical contact applications. IEEE Holm Conference on Electrical Contacts & the International Conference on Electrical Contacts, 281-288.
Gawne DT, Ma U, 1987. Wear mechanisms in electroless nickel coatings. Wear, 120(2), 125-149.
DOI: 10.1016/0043-1648(87)90063-9
Gawrilov GG, 1979. Chemical (electroless) Nickel plating. Portcullis Press, Redhill, 108-125.
Ger MD, Hwang BJ, 2002. Effect of surfactants on co-deposition of PTFE particles with electroless Ni-P coating. Materials Chemistry and Physics, 76(1), 38-45.
DOI: 10.1016/S0254-0584(01)00513-2
Grosjean A, Rezrazi M, Bercot P, 2000. Some morphological characteristics of the incorporation of silicon carbide SiC particles into electroless nickel deposits. Surface and Coatings Technology, 130(2-3), 252-256.
DOI: 10.1016/S0257-8972(00)00714-3
Hanna F, Hamid AZ, Aal AA, 2003. Controlling factors affecting the stability and rate of electroless copper plating. Materials Letters, 58(1-2), 104-109.
DOI: 10.1016/S0167-577X(03)00424-5
Islam M, Azhar MR, Fredj N, Burleigh TD, 2013. Electrochemical impedance spectroscopy and indentation studies of pure and composite electroless Ni–P coatings. Surface & Coatings Technology, 236, 262-268.
DOI: 10.1016/j.surfcoat.2013.09.057
Islam M, Azhar MR, Fredj N, Burleigh TD, Oloyeda OR, Almajid A, Shah SI, 2015a. Influence of SiO2 nanoparticles on hardness and corrosion resistance of electroless Ni–P coatings. Surface & Coatings Technology, 261, 141-148.
DOI: 10.1016/j.surfcoat.2014.11.044
Islam M, Azhar MR, Khalid Y, Khan R, Abdo HS, Dar MA, Oloyeda OR, Burleigh TD, 2015b. Electroless Ni-P/SiC nanocomposite coatings with small amounts of SiC nanoparticles for superior corrosion resistance and hardness. Journal of Materials Engineering and Performance, 24(12), 4835-4843.
DOI: 10.1007/s11665-015-1801-x
Mallory GO, Hajdu B, 1990. Electroless plating: Fundamentals and applications. American Electroplaters and Surface Finishers Society, Orlando, 57-101.
Sahoo P, Das SK, 2011. Tribology of electroless nickel coatings-A review. Materials and Design, 32(4), 1760-1775.
DOI: 10.1016/j.matdes.2010.11.013
Shirtcliffe NJ, McHale G, Atherton S, Newton MI, 2010. An introduction to superhydrophobicity. Advances in Colloid and Interface Science, 161(1-2), 124-138.
DOI: 10.1016/j.cis.2009.11.001
Staia MH, Castillo EJ, Puchi ES, Lewis B, Hintermann HE, 1996. Wear performance and mechanism of electroless Ni-P coating. Surface and Coatings Technology, 86-87(2), 598-602.
DOI: 10.1016/S0257-8972(96)03086-1
Sudagar J, Jiang Q, Jiang ZH, Li GY, Elansezhian R, 2012. The performance of surfactant on the surface characteristics of electroless nickel coating on magnesium alloy. Progress in Organic Coatings, 74(4), 788-793.
DOI: 10.1016/j.progcoat.2011.10.022
Sudagar J, Lian J, Sha W, 2013. Electroless nickel, alloy, composite and nano coatings–A crtical review. Journal of Alloys and Compounds, 571, 183-204.
DOI: 10.1016/j.jallcom.2013.03.107Syed S, 2006.
Atmospheric corrosion of materials. Emirates Journal for Engineering Research, 11(1), 1-24.

Memo

Memo:
Received date:2016-1-30;Accepted date:2016-6-28。
Corresponding author:Dineshsingh G. Thakur
Last Update: 2016-11-24