Corrosion Protection in Presence of Water: V-active VCI Inhibitor for Hydrojeting Metal Cleaning - Industrial Case

摘要

Newly-developed type of organic inhibitor - V-active VCI - was developed in this work, together with the concept and application to an iron/steel ware. The obtained results demonstrated that it was possible to eliminate or reduce the oxidizing action of water/O_2, thereby extending the allowable time before iron ware painting after hydrojeting, and also that the new corrosion inhibitor technology did not interfere with the final quality of paint adhesion. Thus, metallic specimens (iron/steel) were treated/washed by hydrojet (35000 Psi) with 2% V-active VCI SPH 1712 water solution by dilution of the inhibitor in industrial water. Metal sample plates were examined after blasting and after subsequent drying, and were submitted to the paint adhesion tests, to evaluate the duration of temporary protection and oxidation prevention and influence on the adherence of paint (pull off). Using the V-active VCI proposed technology it was also possible to minimize or eliminate the oxidizing action of saline moisture and oxygen in a closed environment, extending the acceptable time before painting without interference in the final quality of painting. The reduced labour and product costs, like reduced water consumption during the preparation process, was a benefit of used technology.