Corrosion inhibition of N80 steel in 15% HCl by pyrazolone derivatives: electrochemical, surface and quantum chemical studies

The corrosion protection of N80 steel in 15% HCl using 2-(3-amino-5-oxo-4,5-dihydro-1<italic>H</italic>-pyrazol-1-yl)(<italic>p</italic>-tolyl)methyl)malononitrile (PZ-1) and 2-((3-amino-5-oxo-4,5-dihydro-1<italic>H</italic>-pyrazol-1-yl)(phenyl)methyl)malononitrile (PZ-2) has been investigated.