Electrochemical Corrosion Testing at Subodh Material Technologists

At Subodh Material Technologists, we provide advanced electrochemical corrosion testing services to evaluate the performance of metals, alloys, and protective coatings in aggressive environments. Our testing capabilities follow ASTM and ISO international standards, delivering accurate, reliable, and traceable corrosion data for industries such as automotive, aerospace, marine, nuclear, defence, and oil & gas.

Electrochemical techniques such as Potentiodynamic Polarization, Electrochemical Impedance Spectroscopy (EIS), and Cyclic Polarization (ASTM G61) allow us to determine corrosion rates, passivation behavior, pitting susceptibility, and coating durability.

Our Capabilities

🔹 Potentiodynamic Polarization

• Standards: ASTM G5, ASTM G59, ASTM G102
  
  

• Determines corrosion potential (E_corr), corrosion current density (I_corr), and corrosion rate through Tafel extrapolation.
  
  

• Widely used for alloy ranking, inhibitor studies, and coating performance evaluation.
  
  

🔹 Electrochemical Impedance Spectroscopy (EIS)

• Standards: ASTM G106, ISO 16773
  
  

• Non-destructive analysis of polarization resistance, charge transfer resistance, and coating integrity.
  
  

• Provides insights into long-term corrosion protection and durability of coatings.
  
  

🔹 Cyclic Potentiodynamic Polarization (Pitting & Crevice Corrosion)

• Standard: ASTM G61
  
  

• Evaluates localized corrosion susceptibility in stainless steels, titanium alloys, and nickel alloys.
  
  

• Essential for assessing pitting and crevice corrosion behavior in chloride-rich and acidic environments.
  
  

🔹 Linear Polarization Resistance (LPR)

• Standard: ASTM G59 / G102
  
  

• Rapid, non-destructive method for instantaneous corrosion rate determination.
  
  

🔹 Open Circuit Potential (OCP) Monitoring

• Records rest potential behavior to assess the tendency for corrosion initiation.
  
  

🔹 Custom Test Environments

• Sulphuric, phosphoric, oxalic acids
  
  

• Sodium nitrate, sodium chloride, synthetic seawater
  
  

• Controlled pH (2–14) and temperature range (ambient to 100 °C)
  
  

• Client-specific electrolytes for simulated service conditions
  
  

Applications

✔ Material qualification for aerospace, marine, oil & gas, nuclear, and defence projects
✔ Coating evaluation – paints, anodizing, conversion coatings, inhibitors
✔ Pitting and crevice corrosion testing of stainless steels, titanium, nickel alloys
✔ Comparative alloy performance for R&D and new material selection
✔ Failure analysis to identify corrosion mechanisms and preventive measures
✔ Inhibitor efficiency evaluation in aggressive electrolytes

Why Choose Subodh Material Technologists

• Testing as per ASTM G5, G59, G61, G102, G106, ISO 16773
  
  

• State-of-the-art potentiostat/galvanostat with EIS and cyclic polarization
  
  

• Accredited laboratory (ISO/IEC 17025:2017) with industry-wide approvals
  
  

• Experienced metallurgists and corrosion specialists
  
  

• Reliable, traceable data for critical engineering decisions

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