Enhancing Reliability & Integrity of Seawater Service S&T Heat Exchangers Through Monel Cladding
11 May 2026 | WA Branch Event | Perth
MA Technical Presentation 11 May 2026
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Abstract
In seawater-operated Shell and Tube Heat Exchangers, tubes side including tubes, tube sheets, channels and body flanges sealing faces are highly exposed to chloride-rich environments, making them vulnerable to pitting, crevice corrosion, and galvanic attack. To mitigate these risks with an economical and reliable solution, we performed weld overlay cladding using Monel 400 on the tube sheets and wetted flange surfaces.
Monel 400 was selected due to:
• Excellent resistance to seawater corrosion
• High resistance to chloride-induced pitting
• Strong performance in marine environments.
• Good weldability and structural compatibility with carbon steel base material
The cladding was executed using SMAW & GTAW (TIG) weld overlay under qualified WPS, PQR and required NDT with controlled heat input and dilution (<5–10%).
About the Presenter
Amir Kabiri is a Chartered Professional Engineer in Pressure Equipment Design Verification and Mechanical Engineering, with over two decades of experience in thermal systems, heat-transfer equipment, and mechanical design across the mining, oil & gas, and renewable energy sectors. Amir holds a Bachelor of Science in Mechanical Engineering (Heat Transfer & Fluid Mechanics) from the University of Kashan.
He has led the design and integration of advanced cooling and thermal-management systems for oil & gas packages, hydrogen power generators, and heavy-duty fast-charging infrastructure, supporting the transition toward low-emission mining technologies. He has also managed engineering design teams delivering customised heat-transfer solutions and both process and non-process packages for mining and oil & gas applications, heavy mobile equipment, and demanding industrial environments.
