The corrosion protection of iron during pickling by substituted N-arylpyrroles having carbaldehyde (-CHO) or amine (-NH2) groups, which can form large molecules by condensation or polymerisation of the monomers, has been studied by linear polarisation techniques. Pyrroles substituted with carbaldehyde groups show the best protection efficiency at 40°C, whereas the protective characteristics of substituted pyrroles containing amine groups improve with increasing temperature in the range 20–60°C.
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References
1.
ImuroK. and HanafuzaT.: Bull. Chem. Soc. Jpn, 1976, 49, 1363.
2.
Vorkapic-FuracJ., MintasM., BURGENMEISTERT., and MANNSCHRECKA.: J. Chem. Soc., Perkin Trans., 1989, 2, 713.
3.
Stupnisek-LisacE., Berkovic-SalajsterK., and VORKAPIC-FURATV.: Corros. Sc., 1988, 28, 1189.
4.
Stupnisek-LisacE.and M. munco5-Huicovit: Proc. 7th European Symp. on Corrosion Inhibitors, Ferrara, Italy, September1990; Ann Univ. Ferrara, NS, Sez. V, 1990, (Suppl. 9), 203.
5.
MansfeldF.: in ‘Advances in corrosion science and technology’, Vol. 6, (ed. FontanaM. G. and StachleR. W.), 163; 1976, New York, Plenum.
6.
IngoldC. K.: ‘Structure and mechanism in organic chemistry’; 1969, New York, Cornell University Press.
