Three industrial coating systems have been tested: a waterborne system; a zinc inorganic primer coated with epoxy and polyurethane topcoat; and a urethane elastomer. The samples were exposed in a salt fog chamber in accordance with the ASTM B 117-90 standard for 3000 h and were removed for evaluation following various exposure times. After each exposure period, the samples were inspected visually according to both ASTM D 714 (blistering) and ASTM D 610 (rust), after which electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) analyses were carried out. Electrochemical noise provides an alternative means for the study of the protective properties of polymeric coatings, allowing corrosion to be monitored under thick coatings, even when the coatings appear to remain in good condition, and serving as a powerful tool for the study of industrial coatings.
Get full access to this article
View all access options for this article.
References
1.
GRUNDMAIERG. and STRATMANNM.: Thin Solid Films1999352119.
2.
DEL GROSSOM.VOGELSANGJ. and FEDRIZZIL.: PrOg. Org. Coatings19993757 and 199937–69.
3.
KENDIGM. and SCULLYJ.: Corros. Sci19973925.
4.
SICFRRYB. S. and EDEND. A.: Frog. Org. Coatings198715269.
5.
FUNICEW.: Proc. 15th Int. Corrosion Council CongressGranada September 2002Plenary Lecture.
6.
MANSFELDF. and LORENZW. J.: ‘Techniques for characterization of electrodes and electrochemical processes’ (ed. VarmaR. and SelmanJ. R.), 581–608; 1991New YorkJohn Wiley & Sons.
7.
MANSFELDF.HANL. T.LEEC. C.CHENC.ZHANGG. and XIAOH.: Corros. Sci199739255.
8.
DAROWICKIK.: Electrochim. Acta199540439.
9.
WALTERG. W.: Corros. Sci198626681.
10.
THOMPSONI. and CAMPBELLD.: C0170S. SW.199436–187.
11.
MANSFELDF.SHIHH.GREENEH. and TSAIC. H.: ‘Electrochemical impedance: analysis and interpretation’ (ed. ScullyJ. R. etal.), ASTMSTP118837–53; 1993Philadelphia, PA ASTM.
12.
KENDIGM.JEANJAQUETS. and LUMSDENJ.: ‘Electrochemical impedance: analysis and interpretation’ (ed. ScullyJ. R. etal.), ASTMSTP1188407–427; 1993Philadelphia, PA ASTM.
13.
KEARNSJ. R.EDEND. A.YAFFEM. R.FAHEYJ. V.REICHERTD. L. and SILVERMAND. C.: ‘Electrochemical noise measurement for corrosion applications’ (ed. KearnsJ. R..), ASTMSTP1277446–470; 1996Philadelphia, PA ASTM.
14.
DAWSONJ. L.: in ‘Electrochemical noise measurements for corrosion applications’, (ed. KearnsJ. R..), ASTMSTP12773–35; 1996Philadelphia, PA ASTM.
15.
TWITER. L. and BIERWAGENG. P.: ‘Organic coatings for corrosion control’ (ed. BierwagenG. P.), ACS Symposium Series 689308–320; 1998Washington, DC American Chemical Society.
16.
MILLSD. J.MABBUTTS. and AKIDR.: J. C0170S. Sci. Eng.19992 paper 18.
17.
MILLSD. J. and MABBUITS.: Proc. 7th Int. Symp. on ‘Electrochemical methods in corrosion research’EMCR2000Budapest June 2000 paper 145.
18.
MANSFELDF.: Proc. 15th Int. Corrosion CongressGranada September 2002Keynote #22.
19.
MANSFELDF.SUNZ. and HSUC. H.: Proc. 7th Int. Symp. 011 ‘Electrochemical methods in corrosion research’EMCR2000Budapest June 2000Keynote #14.
20.
cornsR. A.: Corrosion200157265.
21.
SCHMITTG.: Proc.7th Int. Symp. on ‘Electrochemical methods in corrosion research’EMCR2000Budapest June 2000Keynote #19.
22.
GONZALEZ-NUNEZM. A. and URUCHURTU-CHAVARINJ.: Proc. 15th Int. Corrosion CongressGranada September 2002 paper #478.
23.
SANCHEZA.ESPADAL.URREJOLAS.REYG. and BOUZADAF.: Proc. 15th Int. Corrosion CongressGranada September 2002 paper #668
24.
CHENJ. F. and BOGAERTSW. F.: Corros. Sci1995371839.
25.
BERTOCCIU.GABRIELLIC.HUETF. and KEDDAMM.: J. Electrochem. Soc., 199714431.
26.
BRUSAMARELLOV.LAGOA. and FRANCOC. V.: Corrosion200056273.
27.
SKERRYB. S. and EDEND. A.: Prog. Org. Coatings199119379.
28.
CHENC. T. and SKERRYB. S.: Corrosion199147598.
29.
URUCHURTUJ. and DAWSONJ. L.: Corrosion19874319.
30.
HLADKYK. and DAWSONJ. L.: COITOS. Sci., 198121317.
31.
HLADKYK. and DAWSONJ. L.: Corros. Sci198222231.
32.
COTTISR. and TURGOOSES.: ‘Electrochemical impedance and noise’, Corrosion Testing Made Easy Series (ed. SyrettB. C.), 68; 1999HoustonNACE International.
33.
MANSFELDF.: J. Appl. Electrochem., 199525187.
34.
SEARSONP. C. and DAWSONJ. L.: J. Electrochem. Soc., 1988381908.
35.
BERTOCCIU.GABRIELLIC.HUETF.KEDDAMM. and ROUSSEAUP.: J. Electrochem. Soc., 199714437.
36.
MANSFELDF.HANL. T. and LEEC. C.: J. Electrochem. Soc., 1996143L286.
37.
MANSFELDF.LEEC. C. and ZHANGG.: Electrochim. Acta199843435.
