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Water-based coatings powered by NANO-VpCI

Miksic B., Kharshan M., Camp R.

Farby i Lakiery

2015

nr 4

7--11

Today’s water-borne coatings are steadily approaching to fulfill several requirements that are usually met by solvent-borne systems (good adhesion, corrosion resistance, and improved weathering). Aqueous technologies are generally preferred over their solvent-based counterparts due to ease of application, lower VOC’s, and cost. However, waterborne coatings still struggle to provide long term protection for metals in extremely corrosive environments. Through research it has been found that combining Vapor Phase Corrosion Inhibitors (NANO-VpCI) with a Non-zinc environmentally friendly metal complex inhibitor will significantly improve the long-term corrosion protection of acrylic paints on steel substrates; the combination of these inhibitors provides a synergetic multi-layer defense of corrosion resistance thru passivation and film formation. This paper investigates the use of Vapor Phase Corrosion Inhibitor (NANO-VpCI) technology with a Non-zinc environmentally friendly metal complex inhibitor to greatly improve the long-term corrosion protection of an acrylic coating applied direct-to-metal (DTM).

BIA, DPA, MBTA and DMA as Vapour Phase Corrosion Inhibitors for Mild Steel under different Atmospheric Conditions

Kumar H., Yadav V.

International Letters of Chemistry, Physics and Astronomy

2014

Vol. 1

52-66

Mild steel is widely used as main raw material in fabrication of equipment, chief material of construction and as weapons. During its storage and transportation conditions, it comes in contact with aggressive environment which leads to decrease in mechanical strength and loss in useful properties. Four different vapor phase corrosion inhibitors (VPCIs) i.e. Benzaimidazole (BIA), Diphenyl amine (DPA), 2-mercapto benzothiazole (MBTA) and N,N-dimethyl aniline (DMA) were tested under different atmospheric conditions at 40 °C by Weight Loss, Eschke test, Salt Spray, SO2 test and SEM techniques. All the four VPCIs show good corrosion inhibition efficiency i.e. 65-96 %. The results obtained from all the four corrosion experiments were supported by SEM images.