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Corrosion specialist Cortec has released a long-term corrosion protection product in a spray formula. Protecting against corrosion for up to four years, VpCI-329 D ES is a ready-to-use spray providing strong rust prevention for metals in indoor and outdoor sheltered conditions.

The product can be easily applied/sprayed from a handheld trigger spray bottle, and offers a convenient way to protect gears, spindles, coils, or any other metal parts that require a light coat of oil for further processing and shipment. VpCI-329 D ES contains Vapor phase Corrosion Inhibitors (VpCI) technology and its carrier is a combination of bio-based oil and mineral spirit.

Long term corrosion protection

VpCI’s release into the air and attach electrochemically to the metal surface. The coating provides universal corrosion protection to ferrous and non-ferrous metals and performs effectively even under the adverse conditions of 100% relative humidity as well as the presence of corrosive species such as chlorides, hydrogen sulfide, or other sulfur compounds. The product does not contain any hazardous chromates, nitrites, or phosphate inhibitors. It is thermally stable, providing long-lasting contact and vapor phase corrosion protection for a wider variety of applications.

VpCI 329 D ES was used effectively by a manufacturer of power transmission gears to protect its reduction gears. The sensitivity of the company’s reduction gears requires them to be protected against corrosion during shipment, storage and in between manufacturing processes.

The company, Merger, employed VpCI-329 at a low concentration to protect the internal areas of the speed reducers and gears. The product was poured into the bottom of the gear case lubricant reservoir at only 0.3% of total volume. The oil-based solution provided double action against corrosion.

VpCI-329 works in the contact phase for protection of immersed metal surfaces, while the vapour phase action allows the inhibitors to migrate effectively to non-immersed and remote areas where they adsorb and form a protective layer. For exterior protection, external surfaces were sprayed with Cortec’s CorShield VpCI-369, a temporary coating that leaves a moisture-displacing protective film, providing protection against aggressive environments.     

According to Stephane Morel, a sales manager at Merger, the company now uses VpCI-329 on all its strategic speed reducers designed for lifting in the manufacturing sector. The efficiency of using VpCI-329 at low concentration has resulted in cost savings and increased shipping safety. There is no more need to fill the entire case with lubricating oils, and the company has even been able to save on freight that is no longer considered hazardous.

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