Sage Journals: Discover world-class research

Abstract

Electroless plating of Cr–P alloy as a decorative coating from acidic solution (pH 3·0) containing Cr₂(SO₄)₃.6H₂O, KSCN, glycine and NaH₂PO₂ was studied at 303 K to evaluate it as a novel technique for finishing of components. Spectral studies of the plating bath solution indicated the complexation of Cr³⁺ with KSCN and glycine. The action of these complexing agents was synergistic in nature, giving good quality coating with a high deposition rate. X-ray and SEM studies revealed that Cr–P was partially crystalline and uniformly distributed on the substrate. The percentage of crystallinity and type of crystal planes appeared to vary with the nature of the complexing agent used. The resistance of the coating towards corrosive media was related to the microstructure and the composition of the alloy. The developed procedure is simple, ecofriendly and economically viable.

Keywords

COMPLEXING AGENTS CORROSION RESISTANCE CR-P ALLOY ELECTROLESS DEPOSITION MICROSTRUCTURE

Get full access to this article

View all access options for this article.

References

Snyder

D. L.

: ‘Metal finishing 72th Guide Book and Directory Issue’, 179; 2004, New York, Elsevier Science Inc.

Dennis

J. K.

and Such

T. E.

: ‘Nickel and chromium plating’, 3rd edn, 207; 1993, London, Woodhead.

Smart

, Such

T. E.

and Wake

S. J.

: Trans Inst. Metal Finishing, 1983, 61, 105.

Watson

, Anderson

M. H.

, El-sharif

M. R.

and Chisholm

C. U.

: Trans Inst. Metal Finishing, 1990, 68, 26.

Mallory

G. O.

and Hajdu

J. B.

(ed.): ‘Electroless plating: fundamentals and applications’, 207; 1990, Orlando, FL, AESF.

Shafia Hoor

, Aravinda

C. L.

, Ahmed

M. F.

and Mayanna

S. M.

: J. Mater. Sci., 2000, 19, 1067.

Mimani

and Mayanna

S. M.

: Surface Coating TechnoL, 1996, 79, 246.

Ramesh

, Sheshadri

B. S.

and Mayanna

S. M.

: in ‘Proc. European Workshop on Chemistry, Energy and Environment’, Lisbon, Portugal, July 1997 (ed. Sequearia

C. A. C.

and Moffat

J. B.

), Royal Society Special Publication 217, 505.

Levy

D. J.

: AES Tech Proc., 1963, 29.

10.

Watanabe

, Sakurai

, Hamakaw

, Masumoto

, Shirae

and Suzuki

(ed.): ‘Current topics in amorphous materials—physics and technology’, 137; 1993, New York, Elsevier.

11.

Tharamani

C. N.

, Shahina Begum

and Mayanna

S. M.

: Mater. Chem. Phys., 2004, 83, 278.

12.

Ramesh

, Sheshdri

B. S.

and Mayanna

S. M.

: Trans Inst. Metal Finishing, 1996, 74, 66.

13.

Mayanna

S. M.

and Setty

T. H. V.

: Indian J. Chem., 1972, 10, 295.

14.

Mimani

and Mayanna

S. M.

: Plating Surface Finishing, 1993, 80, 66.

15.

Bassett

, Denney

R. C.

, Jeffery

G. H.

and Medham

(ed.): ‘Vogel's textbook of quantitative inorganic analysis’, 4th edn, 738; 1978, London, ELBS & Longman Group Ltd.

16.

Merz

: Microchim. Acta, 1959, 1959, 454.

17.

Lever

A. B. P.

: Inorganic electronic spectroscopy’; 1984, Amsterdam, Elsevier.

18.

Mimani

and Mayanna

S. M.

: J. AppL Electrochem., 1993, 23, (4), 339.

19.

Klug

H. P.

and Alexander

(ed.): ‘X-ray diffraction process on polycrystalline and amorphous material’, 1980; New York, Wiley-Interscience.

20.

Habazaki

, Ding

S. Q.

, Kawashima

, Asami

, Hashimoto

, Inoue

and Masumoto

D. T.

: Corrosion Sci., 1989, 29, 1319.

Development and characterisation of electroless Cr–P alloy as a decorative coating for automobiles

Abstract

Keywords

Get full access to this article

References