Stress corrosion cracking testing IN SOUR GAS or STRESS CORROSION TESTS in aggressive environments

. Stress Corrosion Cracking Testing or evidence of Stress corrosion cracking are necessary to evaluate the performance of the materials used in extreme working conditions, such as prolonged exposure to particularly aggressive gases such as'H₂S (hydrogen sulfide), that is found especially in the extractive industry. The tests are necessary to develop innovative solutions for products and components in various fields of application.

The tests may be performed on both metallic materials (inox, high alloy) both on advanced materials.

Our corrosion and stress corrosion laboratories are able to perform various types of tests of interest to different sectors such as Automotive, Aerospazio, Oil & Gas, Renewable energies.

Our staff is qualified by NACE as corrosion Technical expert.

For further, articles and regulations, Pontlab invites you to visit the website CORROSIONPEDIA.



We perform tests on specimens of stress corrosion cracking, in accordance with the regulations NACE in chlorinated solutions with mixtures containing H₂S or according to the specifications of the customer.

The equipment allows to perform the tests according to the following characteristics:

  • conditions of pressure and ambient temperature, in accordance with NACE TM0177 method A
  • conditions of high pressure and high temperature, according to NACE TM0177 up to level VII expressed by the standard NACE TM0175.


Sulphide Stress Corrosion CrackingWe perform tests according to NACE TM0177 Method A, operating at ambient temperature and pressure with various mixtures of H₂S and chlorinated solutions.

Read the feature article Improvement of the Test Equipment for a Stress Corrosion Lab through the Axiomatic Design“.

We perform tests in autoclave made of Hastelloy and the ability to 15 l, with the possibility of operating up 103 bar pressure and at a maximum temperature of 210 ° C.

The exposure can be performed on specimens, of tensioned specimens (deflection in 3 O 4 points, C-ring) or products / components; made of metallic material, polymeric or on various kinds of coatings.


slow strain rate test

We perform SSRT stress corrosion tests in accordance with NACE TM0198 and ASTM G129, subjecting the slow tensile test in a chlorinated solution and mixtures of H₂S, in an autoclave made of Hastelloy by the ability to 3 liters with the following characteristics: load capacity up to 30 KN, deformation capacity up to 30 mm, of adjustable constant strain rate of 1×10¯⁸ a 1×10¯ᶟ mm/s.

With our CERT machine They can also be carried out under conditions of temperature and high pressure.


They perform stress tests to’ Hydrogen Induced Cracking (HIC) to evaluate the corrosive effects of embrittlement of a metal material exposed in a hydrogen-rich environment NACE TM0284-2016.