Mehdi Taheri Ph.D., P.Eng.

Associate, Materials & Product Failure / Piping & HVAC
Direct: 647-738-5645

Our Associates perform on-site investigations to determine origin and cause of complex losses. Their process: examine and collect evidence, take on-site photos, interview witnesses, conduct testing in our lab and analyze data to produce technical reports that are clear and concise.


expert summary

Mehdi Taheri is a Materials Failure specialist at -30- Forensic Engineering. During his time at -30-, Mehdi has investigated claims involving industrial equipment, automotive components, plumbing, product failures, cases involving the characterization of materials, and work related claims. In his previous roles, Mehdi has accomplished numerous failure analysis investigations involving automotive parts, piping, high temperature components, and turbine blades as well as provided engineering recommendations to prevent failures in oil and gas, power generation, pulp and paper, and automotive industries.


  • Mechanical Failure Analysis
  • Scanning Electron Microscopy and Energy Dispersive X-Ray Analysis
  • Fractography and Fracture Surface Analysis
  • Material Characterization and Identification
  • Metallurgical Analysis of the Microstructure and Mechanical Properties of Materials
  • Corrosion Characterization and Assessment
  • Gas and Steam Turbine Failure Analysis
  • Rotating Equipment Failure Analysis
  • Boiler Tube Corrosion and Failure
  • Analysis of Welded, Brazed or Soldered joints

academic background

Ph.D. in Materials Science, McMaster University, Hamilton, Ontario, 2013

Masters in Materials Engineering and Corrosion, Sharif University of Technology, Tehran, Iran, 2008

Bachelors in Metallurgical Engineering, Isfahan University of Technology, Isfahan, Iran, 2002

additional courses

  • API 571 - Corrosion and Materials Professional
  • API 577 - Welding Processes, Inspection, and Metallurgy
  • NRCan XRF Analyzer Operator Certification Level II
  • NACE Coating Inspection Program, CIP Level I

employment background

-30- Forensic Engineering
Associate—Materials Failures Group
April 2016 – Present, Toronto

  • Product failure investigations
  • Gas and steam turbine failure investigations
  • Fuel oil tank corrosion investigations
  • Welding, soldering and brazing failure investigations
  • Industrial equipment failure investigations
  • Automotive component failure investigations
  • Investigating failures resulting from inappropriate material selection
  • Cases involving the characterization and/or identification of materials

Acuren Group Inc. 
Head of Failure Analysis
July 2014 – April 2016, Mississauga, ON

  • Performed Field Inspection at Heights and in Confined Space Areas, and Processing, Structural and Power Plants
  • Conducted Rick-Based Inspection (RBI) and Carried out Failure Analysis of Piping and Flanges
  • Led Multiple Engineering and Laboratory Projects as the Head of Failure Analysis and Metallurgical Engineering Department and Established Management Skills as the Assistant Manager of the Laboratory
  • Prepared Proposal and Developed Budgeting for Assigned Projects
  • Conducted Field Inspection and Analyzed Fitness for Service of Pressure Vessels and Piping
  • Performed Replication and Assessment of Creep Failures in Piping and Structures in High Temperature Components
  • Conducted Field Inspection and Analyzed Fitness for Service of Pressure Vessels and Piping

Acuren Group Inc.
Failure Analyst
April 2013 – July 2014, Mississauga, ON

  • Investigated the Fracture Mechanisms of Natural Gas Valves and Fittings.
  • Analyzed the Failure of ERW Steel Pipes and SCC Failure of Natural Gas Pipeline.
  • Performed Root Cause Analysis of Corrosion and Bearing Failures in Power Generation Units.
  • Investigated the Assembly and Fracture Failure of Automotive Parts and Diesel Engine Nozzles.
  • Investigated the Quality of Electroplated Galvanized Plates and Zinc Coatings.
  • Evaluated Wear, Thermo-mechanical Fatigue, and Liquid-Metal Interactions in Die Cast Sleeves.
  • Investigated Forging, Rolling, and Extrusion Defects of Steel, Al alloys, and Precious Metals
  • Elucidated the Failure Mechanisms of Broken Shafts, Boiler Tubes in Power Plants
  • Elucidated the Fatigue Cracking of Turbine Blades in Power Plants
  • Evaluated and Delivered Control Measures for Mitigation of Microbial Corrosion in Power Plants and Residential Buildings
  • Evaluated Fuel Ash Corrosion of Fired Heaters and Boilers
  • Assessed the Creep Failure and Short Term Overheating of Ferritic Steels
  • Investigated the Passivation and Corrosion Resistance of Austenitic and Duplex Stainless Steel for Pressure Vessel Applications
  • Evaluated and Delivered Control Measures for Corrosion Under Insulation of Fasteners and Pipes

McMaster University
Research and Teaching Assistant
January 2009 – April 2013, Hamilton, ON

  • Formulated a Mechanism to Describe How the Surface Film Controls Mg Corrosion
  • Developed H-Charging as a Beneficial Treatment for Mg Corrosion Resistance
  • Evaluated the Corrosion of AA7XXX & AA6XXX Al Alloys, Ti, and 304, 316, 430 Stainless Steels

Sharif University of Technology
Research Assistant
September 2006 – August 2013, Tehran, Iran

  • Fabricated Nano Porous AAO Template by Anodizing Pure Al
  • Developed Multilayered CoNi/Cu Coatings by DC and Pulse Electrodeposition Techniques

Materials Engineering CO-OP
June 2005 – September 2005, Tehran, Iran

  • Determined the Wear Mechanisms of Boronised, Oxidized, and Annealed Pure Titanium
  • Performed Investment Casting and Characterization of Aluminum alloys
  • Carried-out Boronising and Thermal Oxidation of Pure Ti for Wear and Biomedical Application

professional societies and associations

  • Professional Engineers of Ontario (PEO), Engineer in Training (E.I.T.)
  • National Association of Corrosion Engineers (NACE)
  • A Society for Materials (ASM International)

awards and achievements

  • McMaster Graduate Research Scholarship
  • Best poster award of NACE Northern Region – Eastern Conference, Ottawa, ON, August 2011

publications and speaking engagements

Speaking Engagements

  • "A Study of the Surface Flm Formed on Polycrystalline Mg Alloys by Exposure to Water using FIB Cross-Sections and STEM-EDS”, Conference Presentation, NACE Corrosion 2011, Houston, Texas, 2011
  • “Effect of a Novel Thermal Oxidation on Tribological Behavior of Commercial Pure Ti", Conference Presentation, 8th National Conference of Heat Treatment and Surface Engineering, Kerman University, Kerman, Iran, 2007
  • “Effect of a Diffusive Coating of TiB2 /TiB/TiO2 on Tribological Behavior of Commercial Pure Ti”, Conference Presentation, 8th National Conference of Heat Treatment and Surface Engineering, Kerman University, Kerman, Iran, 2007


  • Taheri, M., Kish, J. R., Birbilis, N., Danaie, M., McNally, E. A., & McDermid, J. R. (2014). “Towards a physical description for the origin of enhanced catalytic activity of corroding magnesium surfaces. “ Electrochimica Acta, 116, 396-403.
  • Taheri, M., Phillips, R. C., Kish, J. R., & Botton, G. A. (2012). “Analysis of the surface film formed on Mg by exposure to water using a FIB cross-section and STEM–EDS. “ Corrosion Science, 59, 222-228.
  • Taheri, M., & Kish, J. R. (2013). “Nature of surface film formed on Mg exposed to 1 M NaOH. “ Journal of The Electrochemical Society, 160(1), C36-C41.
  • Taheri, M., Danaie, M., & Kish, J. R. (2014). “TEM examination of the film formed on corroding Mg prior to breakdown. “ Journal of The Electrochemical Society, 161(3), C89-C94.
  • Esfahani, H., Dabir, F., Taheri, M., Sohrabi, N., & Toroghinejad, M. R. (2012). “Sol–gel derived hydroxyapatite coating on TiB2/TiB/Ti substrate. “ Surface Engineering, 28(7), 526-531.
  • Salahi, E., Esfahani, H., Mobasherpour, I., Bijarchi, M. A., & Taheri, M. (2014). “Sintering behavior and mechanical properties of alumina/zirconia multilayers composite via nano-powder processing. “ Ceramics International, 40(2), 2717-2722.
  • Taheri, M., and E. Mohamadi Zahrani. "Effect of novel thermal oxidation process on wear resistance of commercial pure titanium." Surface Engineering 24.6 (2008): 475-478.
  • Taheri, M., & Kish, J. R. (2012). "Effectiveness of a Galvanostatic Cathodic Polarization Pre-Treatment on Improving the Corrosion Resistance of Mg to Aqueous Saline Solutions.” ICMAA.