According to NACE, the worldwide corrosion authority, the total annual cost of corrosion to the Oil & Gas production industry is estimated to be $1.372 billion per annum, which breaks down into $589 million in surface pipeline and facility costs, $463 million annually in downhole tubing expenses, and another $320 million in capital expenditures that are directly relatable to corrosion.

This massive cost to the sector can be minimized through a combination of effective corrosion management programs and by working with such corrosion testing experts as Element to 

  • Reduce the number of leaks
  • Increase plant availability
  • Reduce unplanned maintenance
  • Reduce deferment costs 
  • Help meet the relevant statutory and/or corporate compliance with all of the relevant Safety, Health and Environmental policies

Elements’ platform of internationally located corrosion testing laboratories have the right technical expertise, capabilities and accreditations to support the Oil & gas sector to help solve this immense corrosion challenge. 

We specialize in validating the correct choice of materials and welding processes by using our laboratory based testing capabilities to simulate the pressure, temperature, stress and environmental conditions the Oil & Gas sector increasingly has to operate in.

Our platform, backed by our team of internationally renowned corrosion consultants, provides an extensive range of sour and sweet corrosion services and environmental simulations that follow such international protocols as ASTM, IP MIL, NACE.

These services include:


Sulphide Stress Cracking Testing

We offer sour service materials qualification testing in accordance with the NACE MR0175/ISO 15156 as well as industry specifications and requirements as one of our specialized areas. 

This standard recommends testing to NACE TM0177 Method A, B, C and D tests for resistance of carbon / low alloy steels and CRAs to Sulphide stress corrosion cracking (SSC). These tests are performed in our accredited laboratories worldwide under the standard sour conditions or to specific field conditions.
  • Tensile test in accordance with NACE TM0177, Method A
  • Bent-Beam test in accordance with NACE TM0177, Method B and/or ISO 7539-2
  • C-Ring test in accordance with NACE TM0177, Method C
  • Double-Cantilever-Beam (DCB) test in accordance with NACE TM0177, Method D
We are also accredited to do the Four Point Bend test in accordance with EFC Publication 16, SOP MC-20.14 SSC Four Point Bend TestSour testing for Stress Corrosion Cracking (SCC) of materials such as duplex stainless steel can also be carried out using the same equipment but under different environmental conditions. This type of testing at higher temperatures is of particular importance for weldable martenstic stainless steel where intergranular attack (IGSCC) can occur due to sensitization at the grain boundaries due to carbon depletion.   


HP/HT (High Pressure/High Temperature) Testing

Autoclaves are used to simulate the high pressure, high temperature conditions encountered downhole and in refinery operations. We have a range of these vessels with capacities in the range of 0.25 to 40 liters. These facilities permit bent beam tests and C-ring tests up to 500ºC and pressures up to 34.5 MPa in sour environments. 

This equipment can also be used be used for HP/HT corrosion rate studies and for evaluation of corrosion inhibitor performance under harsh conditions. NACE TM0284 is a method for evaluating the resistance of pipeline and pressure vessel plate steels to hydrogen induced cracking (HIC) caused by hydrogen absorption from phenomena such as sulfide corrosion. HIC tests are carried out in our dedicated laboratories. Failed test pieces are examined for crack sensitivity ratio, crack length ratio and crack thickness ratio using our optical microscopes.


Hydrogen-Induced Cracking (HIC) Testing

NACE TM0284 is a method for evaluating the resistance of pipeline and pressure vessel plate steels to HIC caused by hydrogen absorption from aqueous sulfide corrosion. HIC tests are carried out in our dedicated laboratories. Failed test pieces are examined for crack sensitivity ratio, crack length ratio and crack thickness ratio using our optical microscopes.


Pitting Corrosion/Crevice Corrosion Testing

Pitting corrosion and crevice corrosion forms of localized corrosion attack are the cause of many failures in oil and gas operations. The study of steel resistant to this can be carried out in oxidizing chloride environments as per ASTM G48 Standard. Several methods are described in ASTM G48 including critical pitting temperature and critical crevice temperature. Electrochemical studies to look at critical pitting (CPP) and crevice potentials (CCP) is also a tool for evaluation of these materials resistance to this type of corrosion.


Electrochemical Testing

Electrochemical test techniques for corrosion rate determination, crevice and pitting corrosion resistance are in use for many applications. The most common use of this testing using Linear Polarization Resistance (LPR) and Electrochemical Impedance Spectroscopy (EIS) is for inhibitor evaluation. In our laboratories we can perform full inhibitor evaluations from compatibility testing through to performance testing in Bubble test, Dynamic Rotating Cylinder Electrode (RCE) testing and even flow loops.  Electrochemical method are performed to international standards such as ASTM G5, ASTM G59 polarization resistance measurements and ASTM G61 cyclic potentiodynamic polarization measurements, which gives a measure of  pitting and crevice corrosion resistance).


Corrosion Rate and Sensitization Testing

General corrosion rates calculated in mm per year can be performed to customers’ requirements (specified time and solution), using mass loss techniques described in both ASTM and NACE standards such as ASTM G28 and NACE TM0169.


Salt Spray Corrosion Testing

Salt spray and cyclic humidity/temperature corrosion testing can be done to such international specifications as ASTM B117 or to client specific requirements on test coupons, paints, platings, oil and plastics.


Slow Strain Rate SSR Testing

NACE TM0198 is a method used for quick screening Corrosion Resistant Alloy (CRA) materials for resistance to Stress Corrosion Cracking (SCC) at elevated temperatures in sour oilfield production environments, under constantly increasing strain rates.

Cyclic or Ripple SSRT can also be carried out to provide information on performance of materials under cyclic load around the AYS of the material. 


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