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LUBRICANTS “For these types of applications, the EPA stipulates the use of an EAL.

These are de? ned in the VGP as lubricants that are biodegradable, minimally toxic and are not bioaccumulative. To meet these environmental standards, an oil must meet all three criteria.” – Iain White, Global marketing manager – ExxonMobil Marine

Synthetic esters: speci? c properties characteristics and are suitable for a range of applications.

Volatility: The polarity of ester molecules causes them Mobil SHC Aware Grease EP 2 – provides an excep- to be attracted to one another and because of this more tional balance between reducing the potential for environ- energy (heat) is required to get them to move from a liquid mental damage over conventional products while meeting to a gaseous state. As a result, the synthetic ester lubricants very demanding performance standards. have a high ? ash point and a low rate of evaporation. Mobil SHC Aware ST Series – these stern tube oils

Lubricity: Polarity also causes the ester molecules to be emulsify readily with water and provide outstanding lu- attracted to positively-charged metal surfaces. As a result, brication and rust/corrosion protection with up to 20 per the molecules tend to create a ? lm that requires additional cent water content. Applications include: energy (load) to wipe it off. The result is high lubricity and Mobil SHC Aware Gear Series – these synthetic gear oils low energy consumption in lubricant applications. possess outstanding oxidation and thermal properties and

Detergency/Dispersancy: The polar nature of esters maintain excellent ? uidity even at low temperatures. Mo- makes them good solvents and dispersants. This allows the bil’s SHC Aware Gear Series has also secured key equipment esters to dissolve or disperse oil degradation by-products manufacturer approvals from thruster manufacturers, includ- that might otherwise be deposited as varnish or sludge. ing Nakashima, HHI Hyundai and KTE Nakashima Korea.

Biodegradability: The character of ester linkage provides Conversion from existing mineral oil products to EALs vulnerability for microbe to biodegrade the ester molecule. will require time in dry dock for some applications. It is

This results in high biodegradability rates for ester lubri- therefore essential that the changeover process is as easy to cants, which enables the formulation of environmentally manage as possible. Vessel operators will want to avoid the friendly products. need for solvent ? ushing, as required for Polyglycols, while also ensuring that their EAL is up to the job.

ExxonMobil’s EAL offering The optimal solution is an EAL based on synthetic es-

In order to ensure that vessel operators have access to ters coupled with EAL-compliant performance additive lubricants and greases that not only comply with the VGP technology, such as ExxonMobil’s SHC Aware family but also help to extend equipment life, ExxonMobil has of products. Not all synthetic esters are produced to the developed the Mobil SHC Aware family of high-perfor- same standards but these high-performance lubricants of- mance synthetic ester-based EALs. These include: fer best-in-class performance while also being compatible

Mobil SHC Aware H Series – formulated to provide maxi- with mineral oils. This not only ensures total compliance mum protection for modern high-pressure hydraulic systems. with EPA regulations, it also provides minimal downtime

The oils offer exceptional anti-wear, lubricity and ? lm strength while providing the best available overall protection.

Mobil EAL’sSHC Aware HSHC Aware Grease EP 2SHC Aware STSHC Aware Gear

Controllable pitch props, stabilizers Rudder stock Stern tubes, ? n stabilizersEnclosed gear drives

Uses

Deck equipment Towing notch interfacesControllable pitch propsHeavily loaded gearboxes

Circulation systems Deck grease applicationsCirculation SystemsRolling element bearings 51 www.marinelink.com MN

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