New USDA certified biobased and biodegradable temporary rust preventive for outdoor protection


The US federal agencies and their contractors have to meet special biobased requirements when purchasing products from 139 categories identified by the US Department of Agriculture (USDA). One of these is corrosion preventatives, which must have 53% minimum biobased content to be a qualified product under the mandatory federal purchasing initiative of the USDA BioPreferred Programme.

Cortec Corporation is able to meet this need in the form of EcoLine 3690, a USDA certified biobased product that can be used to replace solvent- and mineral-oil based (RPs).

EcoLine 3690 is a canola-oil-based temporary coating designed for corrosion protection in severe marine and high humidity conditions. It contains 72% USDA certified biobased content, and leaves behind an oily protective film that does not dry. It is a solution for contractors who manufacture parts or equipment for the federal government, and need to prevent rust in interim periods of storage or shipment. It is also applicable to worldwide manufacturers who are looking to tap into the next level of sustainability while reducing VOCs and minimising worker exposure to mineral-oil or solvent-based RPs. EcoLine 3690 can be removed with an alkaline cleaner, and can help operators avoid hazardous waste disposal costs associated with traditional rust preventatives.

A tubing manufacturer has adopted EcoLine 3690 for protection of newly manufactured tube ends, and was “pleased with the corrosion protection results and safety benefits of EcoLine 3690 for its employees”, said Cortec. The temporary coating replaced a solvent-based rust preventative, and impressed the manufacturer with its performance after a multi-month trial on tube bundles in outdoor storage.

EcoLine 3690 can be applied to clean metal surfaces by spray, roll, brush, or dip at a recommended wet film thickness (WFT) of 1.0-3.0 mils. It can also be applied over painted surfaces. EcoLine 3690 has no VOCs, and is temperature stable up to 82-degrees Celsius. It protects multiple metal types, including carbon steel, silver, cast iron, stainless steel, copper, magnesium and aluminium.