In the next installment of our Biodegradable Lubricants series we examine the pros and cons of biodegradable lubricants. How do these lubricants compare to their petroleum-based counterparts? Previously we examined: biodegradability standards, biodegradable base stocks and biodegradable lubricant products. However, are these products right for you? We will look at some pros and cons to see if biodegradable lubricants are the right choice for you.
Pros of Biodegradable Lubricants
- Excellent lubricity; superior to that of mineral oil
- Higher viscosity index than mineral and synthetic oils
- Higher flash point than mineral and synthetic oils
- Less toxic and readily biodegradable
- Renewable and reduce dependency on imported petroleum
- New biotechnology has produced genetically-modified seeds designed for use in lubricants
- Metal-wetting attraction makes them good for keeping dirt and debris off metal surfaces
- Water-soluble PAGs are ideal for fire-resistant lubricants
- Ideal for industries and applications where oil comes in contact with the environment
- No potential for bioaccumulation (build-up in organism fatty tissue)
- Price premiums are expected to decline with further market development
Cons of Biodegradable Lubricants
- Lubricity so potent, friction modifiers must be added to reduce slippage in certain applications
- Insufficient oxidative stability; oil must be treated or modified to ensure performance (which increase costs)
- Small amounts of water can cause serious foaming and degradation
- Cannot withstand high reservoir temperatures (usually greater than 80 C)
- Vegetable base stocks must be hydrogenated to combat low oxidative stability
- Low pour point; can be improved by winterization
- Synthetic esters can be used for cold-temperature environments, but reduce bio-based properties
- Synthetic oils are limited to which additives they can use due to biodegradability standards
- PAGs can emulsify water, which can cause foaming, sludge, and corrosion
- High price premiums for synthetic-based products
Conclusion
Biodegradable lubricants have significant potential to perform better than mineral oils. Developments in biotechnology could allow for specially formulated base oils that will address the current short comings of vegetable oils. As demand increases, price premiums will decrease and the we will become less dependent on petroleum. Synthetic oils already provide superior performance, albeit at a higher cost. Environmental concerns will drive these developments and shift the lubricant market towards biodegradable and environmentally accepted lubricants. To learn more, check out this EPA report on Environmentally Accepted Lubricants (EALs).
Twin Specialties Offers Biodegradable Lubricants
No matter your application or environmental requirements, Twin Specialties can meet your manufacturing, marine, or agricultural needs. We offer a variety of lubricants including: Shell Naturelle, Castrol Performance Bio, and various Food Grade lubricants. Contact Twin Specialties for a quote.