Cormet case studies

A customer normally contacts Cormet looking for suitable test instruments for new research or a test case. There are also many customers who know what they want and provide the essential parameters. Once all the information required such as operating temperature, pressure, environment, test type, specimen type and geometry, construction material, accessories required etc., is known, Cormet's engineers provide the first quotation.

In this stage, there is frequently a knowledge transfer in both directions: Customer gives Cormet information about their requirements and experience. Cormet assists the customer in making right the right choices by giving information about the technical feasibility of the ideas as well as price information about the various alternative approaches and instruments. Because Cormet has built numerous corrosion testing instruments during the last 20 years, we have gained experience of corrosion testing instrument design and we can pass that know-how onto our customers.
 
After the customer and Cormet have agreed on the technical details and price, the customer orders the product. The delivery time is normally between 3 and 12 months depending on the instrument type, design requirement and materials. After detailed inspection and factory testing, the instrument is sent to the customer. Training of operators can take place either on Cormet's premises in Helsinki or on the customer's premises.
 
During the warranty period instruments are guaranteed against any defect due to faulty manufacture or bad craftsmanship, typically for a 12-month period. After the warranty period, Cormet provides maintenance services, spare parts and upgrades.


Collaboration case with Instron to meet customer needs

Generation IV Supercritical water reactor (SCWR) increases the temperature and pressure needs in material testing. Cormet’s Russian client working in the field of nuclear power generation was after a testing machine that would let them do fracture mechanics and fatigue studies in the supercritical water environment.

The client needed exceptionally fast cyclic fatigue, which is why we selected the hydraulic loading device approach. Cormet chose Instron as a partner to deliver a servohydralic actuator and a hydraulic power unit for the project. The delivery included a hydraulic control module to enable the installation of an additional loading device for the HPU. A 100 kN 8800 series hydraulic actuator was used to apply stress to specimen inside the autoclave.

Instron provided everything related to hydraulics, including a load sensor. Tests are performed using Instron’s Wavematrix software package. Autoclave, specimen holders and the whole mounting frame assembly around the system was Cormet’s responsibility.

Over the years we have gained a lot of knowledge on supercritical water test equipment. With this servohydraulic loading device capable of running tests at 650°C (1200 °F) and 30 MPa (4350 psi), Cormet pushed the boundaries of material testing one step further again.


Upgrade case – increased force and speed

The Customer has an autoclave manufactured by Cormet that is more than 15 years old, along with 50kN SSRT equipment. The customer would like to carry out cyclic fatigue testing with a load of up to a 100 kN at a higher speed than the old system is capable of.

Cormet changed the gearbox, load cell and motor to achieve a 100 kN force and faster pull-rod movement. A digital micrometer was added to give additional information about the pull rod displacement. A new PC with the latest software version was also included. The old autoclave found a new life; - after the upgrade it looked almost as good as our new products. The new software offer the latest test features.
 

Left: Loading device before upgrade
Right: Autoclave with new loading device attached, upgraded-computer and electronics are missing from the picture.


Upgrade case – 10kn constant load to pc controlled ssrt

The customer had a seven-year old 10 kN constant-load unit, manufactured by Cormet, working at 350°C temperature and 170 bar pressure. The customer wanted to include SSRT tests in the instrument's capabilities. Because Cormet's PC-controlled loading device provides both the SSRT and constant-load loading patterns, it was agreed with the customer to upgrade the existing system.

The existing gearbox was refurbished and modified so that a planetary gearbox and motor could be added to it. The load cell and supporting structure had to be changed so that they are suitable for SSRT use. A new computer with latest SSRT software was included in the upgrade.

Left: Constant-load system before upgrade.
Right: New SSRT Autoclave. Computer, cables and electronics are not shown in the photo.