Understanding Corrosion in Water Pipelines: A Guide for Pipeline Designers



Last updated: November 17, 2016

What Does Heptane Mean?

Heptane is a water-insoluble hydrocarbon obtained by fractional distillation of petroleum characterized by its petrol-like odor and colorless nature. It is used in the manufacturing of paint and coating additives, adhesives, sealants, chemical intermediates and formulation solvents in industrial and consumer use. It is a standard of determining anesthetic and octane ratings (acts as the zero point on the scale).


Corrosionpedia Explains Heptane

Heptane is an alkane that consists of seven carbon atoms and 16 hydrogen atoms: straight-chained saturated hydrocarbon. It naturally exists in nine isomeric forms that include two enantiomers. It is a flammable liquid that gives out fumes at room temperature and has a flash point of -4°C (24°F), hence a narrow boiling point.

It exists as cycloparaffins and paraffin in the C6-C10 range; it contains undetectable levels of polycyclic aromatic polymer, very low total aromatic and benzene content. It has an ability to absorb many organic substances and is thus used as a diluent of solvent. The purity of the heptane depends on polymerization process.

It is written as n-heptane when the polymer is unbranched, hence depicts a straight-chained structure. The presence of heptane in paintings and coatings forces the consumption of oxygen in microorganisms, which is a vital element in metal corrosion.


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