Molybdate as corrosion inhibitor for hot dip galvanised steel scribed to the substrate: A study based on global and localised electrochemical approaches

L. B. Coelho, E. B. Fava, A. M. Kooijman, Y. Gonzalez-Garcia, M. G. Olivier

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

The effect of sodium molybdate in inhibiting galvanic corrosion of Zn coating and mild steel is addressed. The inhibitor's performance was appraised by Zero Resistance Ammeter on HDG/mild steel galvanic coupling model in 0.05 M NaCl (+5 mM Na2MoO4) media. The effectiveness of Na2MoO4 was evaluated on HDG substrate mechanically scratched to reach the steel. Scanning Vibrating Electrode Technique was employed for assessing the distribution of j from scribed HDG surfaces. This local electrochemistry approach was repeated in NaCl solution to examine the behaviour of HDG when the Zn-coating is partially removed. Surface analysis supported all electrochemical results.

Original languageEnglish
Article number108893
Number of pages16
JournalCorrosion Science
Volume175
DOIs
Publication statusPublished - 2020

Keywords

  • A. Mild steel
  • A. Zinc
  • C. Cathodic protection
  • C. Interfaces
  • C. Neutral inhibition

Fingerprint Dive into the research topics of 'Molybdate as corrosion inhibitor for hot dip galvanised steel scribed to the substrate: A study based on global and localised electrochemical approaches'. Together they form a unique fingerprint.

Cite this