57 The Development of Green Corrosion Inhibitors

Wednesday, June 24, 2009: 10:40 AM
Auditorium (Marriott Inn and Conference Center University Of MD University College)
Andrea Hansen , Cortec Corporation, St. Paul, MN
Margarita Kharshan , Cortec Corporation, St. Paul, MN
Alla Furman , Cortec Corporation, St. Paul, MN
Historically, corrosion inhibitors based on petroleum, calcium nitrate, borate, chromate, or nitrite have been used to prolong the life of metal used in processing systems, metal working operations, water treatment, storage, and reinforced structures.  However, tighter environmental regulations continue to put pressure on these old methods and invite green chemistry improvements.  The creation of new Vapor phase Corrosion Inhibitor (VpCI) and Migratory Corrosion Inhibitor (MCI) technologies gives renewable, bio-based products providing a biodegradable, environmentally safe alternative while offering comparable performance and costs

 

Green chemistry is a process of improvements, wherein the environment is considered along with the chemistry.  Green corrosion inhibitors are designed to function effectively, while reducing the impact on the environment by breaking down into innocuous degradation products after use.  Different approaches have been used to obtain a required or improved environmental profile:

1.  Replacement of solvent- or oil-based carriers in formulations with water-based technology.

2.  Replacement of petroleum-based carriers with the solvents, manufactured from renewable resource. 

3.  The use of biodegradable materials as corrosion inhibitors.

 

This paper will discuss the different approaches used to obtain the VpCI and MCI chemicals that have been used to replace historical corrosion inhibitors.