Corrosion and Corrosion Protection of Cast iron due to Bio-organism

Year : 2025 | Volume : 16 | Issue : 02 | Page : 105 114
    By

    Rajesh Kumar Singh,

  • Madhuram Arush,

  • Jay Prakash Singh,

  1. Associate Professor, Department of Chemistry, Jagdam College, J P University, Chapra, Bihar, India
  2. Research Scholar, Chemistry, Shri Venkateshwar University, Gajraula, Amroha, Bihar, India
  3. Research Scholar, Department of Chemistry, Jagdam College, J P University, Chapra, Bihar, India

Abstract

 Cast iron is a high tensile strength metal. It is generally used for making tools, pipe fitting, electrical fitting equipment and rail track. It interacts with corrosive substances to develop electrochemical cell on their interface. Corrosive substances are acids, bases, salts, bio-wastes, particulates and pollutants. These substances produce hostile medium for materials. These  harmful wastes  discharge  by industries, households, agricultural, urbanization, development of infrastructure, construction works, thermal power stations, hydropower, nuclear power station, transport vehicles,  decomposition of  leaving species etc.  Acidic gases like CO2, NO2 and SO2 create acidic environment for metals.  Other factors like, humidity, acid rain, global warming and climate change responsible for corrosion of materials.   Metals corrode in above mentioned corrosive medium and they exhibit galvanic, pitting, stress, crevice and other forms of corrosion. The corrosive substances change internal and external morphology of metals and alter their physical, chemical and mechanical properties. Cast iron undergoes in process graphitization corrosion. The corrosion rate of aforesaid metal is calculated by weight loss method whereas potentiostat uses for the determination of corrosion potential, corrosion current and current density. By the use of these techniques, corrosion rates of metals obtained uncoated and coated metal in different temperatures and concentrations in presence of bio-wastes.    The coating compound 6,11,11-trimethyldecahydro-6,9-methanobenzo[8]annulene-5,10-diylidenebishydrazine synthesized and it used for corrosion protection of  cast iron. The coating efficiency and surface coverage were calculated by the use of weight loss method. The coating compound develops passive barrier on metal surface which suppress the attack of hydronium ions. The passive barrier formation studied by thermo-dynamical parameters like activation energy, heat of adsorption, free energy, enthalpy and entropy.

Keywords: Cast iron, climate change, acidic gases, moisture, micro & macro-organism, passive barrier, coating compound, thermal parameters.

[This article belongs to Journal of Modern Chemistry & Chemical Technology ]

How to cite this article:
Rajesh Kumar Singh, Madhuram Arush, Jay Prakash Singh. Corrosion and Corrosion Protection of Cast iron due to Bio-organism. Journal of Modern Chemistry & Chemical Technology. 2025; 16(02):105-114.
How to cite this URL:
Rajesh Kumar Singh, Madhuram Arush, Jay Prakash Singh. Corrosion and Corrosion Protection of Cast iron due to Bio-organism. Journal of Modern Chemistry & Chemical Technology. 2025; 16(02):105-114. Available from: https://journals.stmjournals.com/jomcct/article=2025/view=215228


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Regular Issue Subscription Review Article
Volume 16
Issue 02
Received 16/06/2025
Accepted 26/06/2025
Published 01/07/2025
Publication Time 15 Days
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