Understanding Corrosion in Water Pipelines: A Guide for Pipeline Designers



Last updated: February 16, 2016

What Does Biostat Mean?

Biostats are a special type of lubricating oil that contains selected additives which ensures efficient oxidation stability, good anti-corrosion and anti-wear properties along with low aquatic toxicity. The viscosity index of biostat is very high because of the combination of various base oils in biostats as well as its very low pour point that makes it extremely compatible with elastomeric seal materials.


Corrosionpedia Explains Biostat

Biostats must be OSPAR (Oslo/Paris convention for the Protection of the Marine Environment) registered and fully compliant with the US 2013 VGP. A biostat acts as a corrosion inhibitor and protects joints near the seal areas in the equipment from hydrogen sulfide and sulfate-reducing bacteria. Biostats are manufactured by oil and chemical companies under various brands and specifications, but the sole purpose of a biostat is to work as an anti-corrosive substance. Most biostats are effective in saline water and in fresh water. Characteristics of biostats:

  • Viscosity – 100 Centistokes at 40 °C (104 °F)
  • Grade – ISO 3448
  • Sub Grade – ISO VG 100

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