Study and Investigation of the Nature of Metallic Destruction in Crude Oils


Author (s):

  1. Jagath K. Premachandra, University of Moratuwa, Katubedda
  2. Suresh Aluvihara, University of Peradeniya, Peradeniya, sureshaluvihare@gmail.com

Abstract:

Metallic destruction is a plentiful utterance regarding the crude refining industry while it is causing undesirable coercion on the durability. The investigations of the impact of dominant corrosive properties of two different types of crude oils on the corrosion rates of seven different types of ferrous metals, qualitative analysis of the corrosion, and analysis of the decay of the metals into crude oils were the pivotal objectives of this study. The significant corrosive compounds of both crude oils were tested by standard methods and instruments. A prepared set of similar sized metal coupons were immersed separately in both crude oils to determine their corrosion rates in order of after certain immersion periods by weight loss method while observing the corroded metal surfaces through the 400X lens of an optical microscope. The decayed metal concentrations into crude oils were tested. The deductions of the initial hardness of metal coupons were tested. There were found lower corrosion rates from stainless steels in both crude oils, higher corrosive tendency from the salts in crude oils, formations of the FeS, Fe2O3, corrosion cracks and cavities, decay of ferrous and copper into crude oils regarding some metals and the reductions of the initial hardness of each metal coupon after corrosion.

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