Stimuli-Responsive Epoxy Coatings with pH-Triggered Self-Healing for Long-Term Marine Corrosion Protection

Vikramsinha V. Mane; Vratraj K Joshi; M K Ranganathaswamy; Elangovan Muniyandy; Shahbaz Juneja

doi:10.5750/ijme.v168iA5(S).2002

PDF (GBP 29.99)

Published: Oct 21, 2026

DOI: https://doi.org/10.5750/ijme.v168iA5(S).2002

Keywords:

Stimuli-responsive epoxy coating pH-triggered self-healing Marine corrosion protection Microcapsules

Vikramsinha V. Mane

Department of Mechanical Engineering Terna Public Charitable Trust’s College of Engineering Osmanabad Solapur Road, Osmanabad, 413501, India

Vratraj K Joshi

Subject Matter Expert, SSM infotech, Surat, India

Ranganathaswamy M K

Department of Mechanical Engineering, School of Engineering and Technology, JAIN (Deemed to be University), Bangalore, Karnataka, India

Elangovan Muniyandy

Saveetha School of Engineering. Saveetha Institute of Medical and Technical Sciences, Chennai, 602105, India

Shahbaz Juneja

Department of Mechanical Engineering, Chandigarh University, Mohali, Punjab, India

Abstract

Marine steel structures suffer severe corrosion from continuous seawater exposure, chloride ions, and mechanical
damage, while conventional epoxy coatings provide limited protection after coating failure. This research develops three pH-triggered self-healing epoxy coatings using a zinc-rich epoxy primer on American Society for Testing and Materials (ASTM A36) marine steel and a bisphenol-A epoxy matrix containing pH-responsive Polyurethane-Formaldehyde (PUF) microcapsules loaded with dicyclopentadiene (DCPD) healing agent and benzotriazole (BTA) corrosion inhibitor. Coating performance was evaluated using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), adhesion strength, scratch self-healing, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). Among the developed coatings, the 10 wt% microcapsule formulation exhibited optimum performance with 69.8% healing efficiency, 0.6 μA/cm² corrosion current density, 0.007 mm/year corrosion rate, and 9.1×10⁶ Ω·cm² impedance modulus. SEM confirmed crack closure, while FTIR verified successful healing component incorporation, providing durable corrosion protection for marine steel structures.

Issue

Vol. 168 No. A5(S) (2026): Integrating Innovation Across Disciplines New Paradigms in Multidisciplinary Research

Section

Articles

Most read articles by the same author(s)

Ranganathaswamy M K, Girish A. Kashid, Abhijeet Deshpande, Swamynathan S M, Physics Informed Neural Network Model for Sustainable Marine Material Degradation Prediction Under Multiphysical Ocean Conditions , International Journal of Maritime Engineering: Vol. 168 No. A5(S) (2026): Integrating Innovation Across Disciplines New Paradigms in Multidisciplinary Research
Prasad M. Patare, Harjot Singh Gill, Elangovan Muniyandy, Mukesh Didwania, Akanksha Mishra, Development of Smart Self-Healing Polymer Composites for Durable Offshore Marine Structural Protection Under Seawater Exposure , International Journal of Maritime Engineering: Vol. 168 No. A5(S) (2026): Integrating Innovation Across Disciplines New Paradigms in Multidisciplinary Research

Submissions

To make a Submission to IJME, click here

Subscriptions

To Subscribe to IJME, Click Here for Subscription Options

Information

Join the Royal Institution of Naval Architects

The University of Buckingham Press is delighted to partner with RINA on the publication of IJME. RINA is a global membership body for the maritime industry and has Members in 140 countries. To see the options of becoming a Member at RINA, click here

UBP Journal Policies

Peer Review

Once articles are accepted to peer-review, all articles must be blind peer reviewed by at least two reviewers. Each reviewer will submit their review including comments and a recommendation when to accept for publication, reject or to request revisions to the articles.

Respect for Participants:

All Journals will treat all individuals involved in research with dignity and respect..

Informed Consent:

Authors must obtain and document informed consent from participants, ensuring they understand the research purpose, procedures, and potential risks.

Data Protection and Confidentiality:

See University of Buckingham’s Press’ Data Protection Policy.

Conflict of Interest Disclosure:

Authors are required to disclose any potential conflicts of interest, including financial or personal relationships that might influence their research or its interpretation.

Authorship and Attribution:

All individuals who made substantial contributions to the research must be acknowledged and those listed as authors must have approved the final text.

Data Integrity and Reporting:

Authors must accurately present their research findings, avoid fabrication or falsification of data, and provide sufficient detail for replication.

Plagiarism:

Journals should confirm they are using established plagiarism software, ensuring that submitted work is original and appropriately cites sources.

Ethical Approval:

For research involving human or animal subjects, it is required that confirmation that ethical approval was obtained from relevant institutional review boards or ethics committees.

Scientific Misconduct:

Any suspected scientific misconduct, such as fabrication, falsification, or plagiarism, must be immediately reported to the Publisher by emailing info@unibuckinghampress.com

Article Sidebar

Main Article Content

Abstract

Article Details

Most read articles by the same author(s)