Stress Corrosion Cracking

We perform SSRT stress corrosion testing in accordance with NACE TM0198 and ASTM G129, subjecting the test specimens to slow tensile stress in chlorinated solutions and H₂S mixtures. The tests are carried out in a 3-litre Hastelloy autoclave with the following characteristics: - load capacity up to 30 KN - deformation capacity up to 30 mm - constant deformation speed adjustable from 1×10¯⁸ to 1×10¯ᶟ mm/s. With our CERT machine, tests can also be performed under high temperature and pressure conditions.

We perform stress corrosion testing on samples in accordance with NACE standards in chlorinated solutions with mixtures containing H₂S or according to customer specifications. Our equipment allows us to perform tests according to the following characteristics: - ambient pressure and temperature conditions, according to NACE TM0177 method A - high pressure and high temperature conditions, according to NACE TM0177 up to level VII as expressed by NACE TM017

We perform tests according to NACE TM0177 method A, operating at ambient pressure and temperature with various mixtures of H₂S and chlorinated solutions.

Read the in-depth article ‘Improvement of the Test Equipment for a Stress Corrosion Lab through the Axiomatic Design’ .

We perform tests in an autoclave made of Hastelloy with a capacity of 15 litres, capable of operating at pressures up to 103 bar and maximum temperatures of 210°C. Exposure can be carried out on test pieces, on tensioned test pieces (deflection in 3 or 4 points, C-ring) or on products/components made of metal, polymer or various types of coatings.

HIC tests (Hydrogen Induced Cracking) are performed to assess the resistance of metallic materials to hydrogen embrittlement in corrosive environments, a phenomenon that can compromise the structural integrity of materials, causing internal cracking and a reduction in mechanical strength. These tests are essential for sectors such as oil & gas, energy and the chemical industry, where materials are frequently exposed to aggressive conditions with high concentrations of hydrogen. HIC tests identify a material's susceptibility to degradation, supporting the choice of suitable alloys and treatments to prevent structural damage.

We perform accelerated ammonia (NH₃) exposure tests to evaluate the corrosion resistance of materials, coatings, and components. Ammonia is an aggressive gas that, under certain conditions, can compromise the structural and functional integrity of products.

This type of testing is essential in several critical industrial sectors:

Maritime Transport and Logistics LNG (Liquefied Natural Gas):
The test is essential for materials used for the storage and transportation of liquid gases (such as ammonia itself or LNG) under extreme conditions, often at very low temperatures and/or high pressures. Ensuring corrosion resistance is vital for safety and efficiency.

Automotive Industry:
With the evolution of fuels and the growing interest in ammonia as a potential energy carrier or in catalytic reduction systems (SCR), it is crucial to test materials to select those best suited to work in an environment containing (NH₃).
Our ammonia exposure tests are applied to a wide range of materials to evaluate their durability:

Metals and Alloys

Protective Coatings (paints, surface treatments)

Plastic and Polymer Components

We evaluate their ability to maintain their original properties and corrosion resistance when exposed to the aggressive gas.

Alternating immersion corrosion (or cyclic corrosion) is a type of accelerated laboratory test that simulates aggressive environments (e.g., marine or coastal), characterized by repeated wetting and drying cycles in the presence of an electrolyte (such as saline water).

This type of test is applied in various sectors, including aerospace, aviation, and naval engineering.

Its purpose is to accelerate the degradation process and evaluate the susceptibility of materials, particularly aluminum alloys and high-strength ferrous alloys, to stress corrosion cracking (SCC) and other forms of localized corrosion.