Testing that Reaches the World

Clark Testing corrosion testing services subject products and components to the rigorous environmental conditions that will replicate the actual operating condition in the field. Corrosion testing services include accelerated aging, salt spray, sour service testing, materials testing, and lubricant testing.

Our corrosion testing laboratory replicates products in continuous service accelerating the aging process to ensure that they will reach their projected design life. Corrosion testing can prevent the negative effects that corrosion will have on materials in their intended service environments by testing in a laboratory setting.

Salt Spray

Salt spray or salt fog testing, is performed by ASTM B117, which is the most common accelerated corrosion procedure.

Additional tests include:

• ASTM D1654 - Salt corrosion testing such as scribing
• ASTM D3170 - Gravelometer
• ASTM D3359 – Adhesion, before or after salt spray exposure.

Clark Testing also conducts cyclic corrosion tests under GMW14872 and SAE J2334 that simulate alternating cycles of electrolyte (salt) exposure, drydown, and humidity.

Lubricants

Clark Testing offers Corrosion-related testing on Lubricants.

This testing can answer your questions on...

• How well does this lubricant resist oxidation?
• How well does this lubricant work in a corrosive atmosphere?

Some tests include:

• ASTM D2070/Cincinnati Milacron - Thermal Stability of Hydraulic Oils
• ASTM D4636 - Corrosiveness and Oxidation Stability of Hydraulic Oils, Aircraft Turbine Engine Lubricants, and Other Highly Refined Oils
• ASTM D7820 - Engine Coolant Corrosion Protection Under Accelerated Thermal and Oxidizing Conditions Using a Rotating Pressure Vessel

NACE - Sour Service and Materials Testing

A common function of the NACE Lab is testing tubular products to meet the API requirements for sour service pipe sold as oil country tubular goods (OCTG). We perform the testing that requires Hydrogen Sulfide exposure (Sulfide Stress Cracking). H2S corrosion process occurs during drilling for oil and natural gas, in the petrochemical industry, oil refineries, and even in the food processing industries. Laboratory investigation of corrosion and corrosion resistance can help you establish material selection under the prevailing conditions of use. Corrosion depends upon the environment, the type of concentration of pollutants, temperature, pressure, and dynamic activity.

NACE testing is typically accomplished on steel bars, pipe/tubulars, plate/sheet. Preparation of testing may be through a section of bar or pipe. We can also perform testing on materials with corrosion inhibitors, such as paint or WD40, as well as volatile corrosion inhibitors. Samples are subjected to a prescribed load in a corrosive solution of salt water saturated with H2S; designed to mimic field conditions found in actual use.

Clark Testing also evaluates Vapor-Inhibiting Ability of Volatile Corrosion Inhibitor Materials for Temporary Protection of Ferrous Metal Surfaces. Volatile corrosion Inhibitor materials are widely used to provide temporary corrosion protection for the surfaces of ferrous metal parts.

Typical testing runs from five days to 30 days, based on the test selected. We can customize solution chemistry, gas concentration, or the testing time to meet your requirements. Results are reported for each group of tests and include the sample information, test conditions, and final result.

Capabilities Offered Includes:

• Environmental corrosion testing in an H2S rich solution
• Testing services for API material qualification
• Custom immersion testing
• NACE Method TM0177 - Sulfide Stress Cracking (SSC) - methods A and D: Tensile, Bent Beam, and Double Cantilever Beam (DCB)
• NACE Method TM0284 - Hydrogen Induced Cracking (HIC)
• NACE Method 0208 - Volatile Corrosion Inhibition