Sulfide Stress Cracking (SSC) Testing - TCA Lab / Alfa Chemistry

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Sulfide Stress Cracking (SSC) Testing

In the presence of water and hydrogen sulfide (H₂S), a kind of metal cracking related to corrosion and tensile stress is called hydrogen sulfide/sulfide stress cracking (SSC). SSC is a kind of hydrogen stress cracking, which is related to metal embrittlement caused by hydrogen atoms generated by acid corrosion on the metal surface. The presence of sulfides promotes the absorption of hydrogen. Atomic hydrogen can diffuse into the metal, reducing ductility and increasing the susceptibility to cracking. High-strength metal materials and hard weld areas are prone to SSC. In oil and natural gas (especially natural gas) long-distance pipelines, the sulfide stress corrosion cracking of high-pressure and high-strength pipelines can cause major safety accidents. Therefore, it is necessary to evaluate the anti-SSC performance of pipeline steel to ensure the safety of the pipeline.

T,C&A sulfide stress cracking (SSC) testing lab

T,C&A Lab is an independent third-party testing and research organization focusing on materials, which can provide SSC testing service according to NACE TM 0177 method and ISO standard tests. Our testing services can help customers evaluate the susceptibility of materials to H₂S/sulfide stress corrosion cracking in a wet H₂S environment, and select suitable materials for working in H₂S media.

The test solutions we provide include but are not limited to:

We evaluate the performance of oil and natural gas pipelines, high-pressure and high-strength pipelines, boilers, liquefied gas tanks, etc. for sour service applications using the following test methods:

NACE TM0177

Method A – Uniaxial Tensile Testing
Sample requirements: The length of the sample is not less than 100mm, the working section should be 25.4mm long and 6.35±0.13mm in diameter. For small non-standard samples, the test section diameter is 3.81±0.05mm and the working section is 25.4mm long. There are 3 samples in each group.

Method B – Bent Beam Testing
Sample requirements: Sample length×width×thickness=67.3mm×4.57mm×1.52mm.

Method C – C-Ring Testing
Sample requirements: The outer diameter is not less than 15.9mm, the ratio of width to thickness is between 2-10, and the ratio of diameter to thickness is between 10-100.

Method D – Double Cantilever Beam (DCB) Testing
Sample requirements: Conventional sample length×width×thickness not less than 101.6mm×25.4mm×9.35mm, thin sample thickness not less than 4.76mm

NACE TM0316

Four Point Bend Test

EFC 16

Carbon and Low Alloy Steel Test Methods

EFC 17

Corrosion-Resistant Alloys (CRA) Test Methods

Standards we test to

NACE TM 017	Metal is Resistant to Sulfide Stress Cracking and Stress Corrosion in H₂S Environment
NACE MR 0175	Petroleum and Natural Gas Industries—Materials for Use in H₂S-containing Environments in Oil and Gas Production
NACE TM0316	Four-Point Bend Testing of Materials for Oil and Gas Applications
ISO 15156	Petroleum and Natural Gas Industries — Materials for Use in H₂S-containing Environments in Oil and Gas Production
ISO 7539	Corrosion of Metals and Alloys — Stress Corrosion Testing
EFC 16	Guidelines on Materials Requirements for Carbon and Low Alloy Steels for H₂S-Containing Environments in Oil and Gas Production
EFC 17	Corrosion Resistant Alloys for Oil and Gas Production - Guidance on General Requirements and Test Methods for H₂S Service

In addition, the experts in our Sulfide Stress Cracking (SSC) Testing Laboratory also provide a variety of custom tests as you need. Let's discuss the customized service with our experts for free.

Instruments and data

References

El-Sherik, A. M.; et al. Trends in oil and gas corrosion research and technologies: Production and transmission. Woodhead Publishing, 2017.
Ziaei, S. M. R.; et al. Sulfide stress corrosion cracking and hydrogen induced cracking of A216-WCC wellhead flow control valve body. Case Studies in Engineering Failure Analysis 1.3 (2013): 223-234.

T,C&A Lab's services include, but are not limited to

Corrosion Inhibitor Testing Crevice Corrosion Testing Electrochemical Corrosion Testing Galvanic Corrosion Testing High Pressure High Temperature (HPHT) Corrosion Testing Hydrogen Embrittlement Testing Intergranular Corrosion (IGC) Testing Pitting Corrosion Testing Salt Spray Testing Sour Service Corrosion Testing Stress Corrosion Cracking (SCC) Testing Sulfide Stress Cracking (SSC) Testing

Note: this service is for Research Use Only and Not intended for clinical use.

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Material Testing

T,C & A LAB is an independent lab providing quality or custom testing, characterization and analysis of a variety of materials. Our engaged experts are ready to help you.

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