The iron powder test for naphthenic acid corrosion studies

Conference · Mon Nov 01 04:00:00 EST 1999

OSTI ID:696977

Hau, J L; Yepez, O; Specht, M I; Lorenzo, R ^[1]

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1. PDVSA-Intevep, Caracas (Venezuela)

In the course of an ongoing investigation into the phenomenon of naphthenic acid corrosion, a new test method has evolved and is currently being further developed to substitute the total acid number (TAN or neutralization number) as an indicator for naphthenic acid corrosion potential. It can also be used to complement conventional autoclave corrosion tests in high temperature environments, which are based on weight loss of steel coupons. In this new method an oil sample reacts with pure iron powder within an autoclave heated to the testing temperature. The result is based on the amount of dissolved iron found in the oil sample. The oil sample can dissolve an amount of iron for a given time at a given temperature, depending on the naphthenic acid corrosion, since these acids react with iron to produce oil soluble iron naphthenates. This paper describes the method, compares it with conventional crude corrosiveness testing, and proposes it as a new way of measuring naphthenic acid corrosion potential.

• OSTI ID: 696977
• Report Number(s): CONF-990401--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
36 MATERIALS SCIENCE
CARBON STEELS
CHROMIUM-MOLYBDENUM STEELS
CORROSION
CORROSIVE EFFECTS
MATERIALS TESTING
MEASURING METHODS
MONOCARBOXYLIC ACIDS
PETROLEUM REFINERIES