Sage Journals: Discover world-class research

Abstract

This paper discusses the performance of a zinc rich ethyl silicate primer by employing accelerated tests and electrochemical evaluations. The primer has been applied on carbon steel panels and a series of accelerated tests, e.g. salt spray (according to ASTM Bll7-03) and 100% relative humidity (according to ASTM D2247-02) were used for evaluating coated panels. Electrochemical evaluations of the primer were studied using electrochemical impedance spectroscopy and by determining the electric potential during immersion in 3⋅5% NaCl solution for a period of 120 days. The characteristics and properties of the coated samples were assessed by measuring the fluctuations in resistance and capacitance of coatings. The results revealed that the open circuit potential of coated panels were in the ranges of –1⋅12 to –1⋅02 V versus saturated calomel reference electrode. The extracted parameters allowed the examination of the coating degradation.

Keywords

ZINC RICH ETHYL SILICATE PRIMER EIS ACCELERATED TESTS

Get full access to this article

View all access options for this article.

References

Marchebois

, Touzain

, Joiret

and Bernard

: Prog. Org. Coat., 2002, 45, 415–421.

Wicks

Z. W.

, Jones

F. N.

and Pappas

S. P.

: ‘Organic coatings science and Technology’, 2nd edn; 1999, New York, John Wiley and Sons.

Abreu

C. M.

, Izquierdo

, Keddam

, Novoa

X. R.

and Takenouti

: Electrochim. Acta, 1996, 41, 2405–2415.

Knudsen

O. O.

, Steinsmo

and Bjordal

: Frog. Org. Coat., 2005, 54, 224–229.

Mansfeld

, Kendig

M. W.

and Tsai

: Corrosion, 1982, 38, 478–485.

Murray

J. N.

: Frog. Org. Coat., 1997, 31, 375–391.

van Westing

E. P. M.

, Ferrari

G. M.

and Dewit

J. H. W.

: Corros. Sci., 1994, 36, 1323–1346.

Chen

C. T.

and Skery

B. S.

: Corrosion, 1991, 47, 598–611.

Feliu

Jr , Barajas

J. R.

, Bastidas

J. M.

, Morcillo

and Feliu

: in ‘Electrochemical impedance: analysis and interpretation’, 438–449; 1993, Philadelphia, PA, American Society for Testing and Materials.

10.

Murray

J. N.

and Moran

P. J.

: Corrosion, 1989, 45, 34–43.

11.

Loveday

, Peterson

and Rodgers

: J. Coat. Technot, 2005,2, 22–27.

12.

Deflorian

and Rossi

: Electrochim. Acta, 2006, 51, 1736–1744.

13.

Kendig

M. W.

, Mansfeld

and Tsai

: Corros. Sci., 1983, 23, 317–329.

14.

Gyrorik

G. L.

, Pajkossy

and Lengyel

: Frog. Org. Coat., 2006, 56, 304–310.

15.

Akbarinezhad

and Faridi

H. R.

: Surf Eng., 2008, 24, 280–286.

16.

Lee

C. C.

and Mansfeld

: Corros. Sci., 1999, 41, 439–461.

17.

Akbarinezhad

, Neshati

and Rezaei

: Surf Eng., 2007, 5, 380–383.

18.

Akbarinezhad

, Rezaei

and Neshati

: Frog. Org. Coat., 2008, 61, 45–52.

19.

Hinderliter

B. R.

, Croll

S. G.

, Tallman

D. E.

, Su

and Bierwagen

G. P.

: Electrochim. Acta, 2006, 51, 4505–4515.

20.

Marchebois

, Joiret

, Savall

, Bernard

and Touzain

: Surf Coat. Technol. 2002, 157, 151–161.

21.

Marchebois

, Keddam

, Savall

, Bernard

and Touzain

: Electrochim. Acta, 2004, 49, 1719–1729.

22.

Vilche

J. R.

, Bucharsky

E. C.

and Giudice

C. A.

: Corros. Sci., 2002, 44, 1287–1309.

23.

Feliu

Barranco, S.

and Feliu

: Corros. Set, 2004, 46, 2203–2220.

24.

‘Standard practice for operating salt sprays (fog) apparatus’, B117-03, ASTM, Philadelphia, PA, USA, 2006.

25.

‘Standard practice for testing water resistance of coatings in 100% relative humidity’, D 2247-02, ASTM, Philadelphia, PA, USA, 2006.

26.

‘Standard test method for evaluating degree of rusting on painted steel surfaces’, D610-01, ASTM, Philadelphia, PA, USA, 2006.

27.

Parashar

, Srivastava

and Kumar

: Frog. Org. Coat., 2001, 42, 1–14.

Evaluation of zinc rich ethyl silicate primer by applying electrochemical methods

Abstract

Keywords

Get full access to this article

References