An academic research organisation, with a strong background in organic chemistry and interdisciplinary research, has developed a highly efficient corrosion inhibitor of metals and alloys in acidic media, based on aqueous polyaniline nanodispersion.
Corrosion is a dangerous and costly problem. It is a natural process that converts a refined metal into a more chemically-stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment. Corrosion engineering is the field dedicated to controlling and preventing corrosion.
The innovative technology developed by the Bulgarian research team provides a convenient method for adding insoluble polyaniline into acidic media during pickling, acid cleaning, etc. The inhibitor ensures effective corrosion protection at low concentrations of 20 to 40 part per million. It is also active in aggressive media and at high temperatures, working both against general and pitting corrosion. The inhibitor does not hinder the removal of metal oxides and other contaminants from the metal surface during pickling. The dispersion is stable and has a long shelf life. It is prepared from readily available materials, and the process does not require any special equipment and control methods, other than those available in standard manufacturing facilities.
The manufacturing know-how and specification data, as well as test reports from using the dispersion as a corrosion inhibitor in acidic environments is available for interested companies under manufacturing agreement.