cladding | Nanomaterials
Test results under the API-5LD and DNV-OS-F101 standards on Alloy 625 clad samples Test
Acceptance criteria Bend test Tensile test
Charpy impact test Shear test
Corrosion test Hardness
Chemical composition Source: MesoCoat
No cracks longer than 0.125 inches (0.32cm) > 65 ksi > 40 J
20,000 psi
Similar to weld overlay Wrought plate (7.8 mpy)
Max 325 HV UNS 06625
conducted on X65 carbon steel substrate that was clad with a 3 mm thick layer of Alloy 625 using the Cerma- Clad fusion process. ASTM G28 tests indicated a corrosion rate 85% lower than that of the widely used weld overlay technology, while bond strength tests exceeded the API 5LD standard by 50%. MesoCoat says that ASTM A264 mechanical testing met all requirements of API 5LD while the EDAX analysis for composition and metallurgy demonstrated little to no iron dilution beyond 0.1mm from the base metal. According to the company, this is an improvement of at least 200 times over competing weld overlay where iron dilution can be seen as far as 2mm from the clad layer. MesoCoat has also recently completed testing and
qualification of its wear resistant CermaClad WRA- tungsten carbide product with one of the largest oil sands producers in Canada. The company says test results have shown 67% lower wear rate, minimal dilution, crack-free coatings and low porosity for clad thicknesses ranging from 8mm to 15mm compared to competing tungsten carbide solutions.
Future potential “Our metallurgically bonded clad pipes are not only easy to reel and install, but work very well with thick
Results Pass
67 ksi 406.7J
31,257 psi
Weld overlay (177 mpy) CermaClad (10-30 mpy)
300 HV (average range: 205-246) Compliant, Fe<2%
walled and large diameter pipes. The pipes can be clad at a high production rate, which ensures timely availability, offer good metallurgical and mechanical properties, and are highly cost competitive. In addition, there are no health and safety issues associated with the process and the final clad pipe is entirely compatible with cathodic protection systems,” Ghilydal says. There are a number of projects around the world that require clad pipes in large quantities. With a lot of remaining oil reserves in locations that are further out, much deeper, and have higher pressure, temperature and corrosive environments, we see excellent demand in the future for clad pipes.”
Looking further ahead, MesoCoat sees development
potential to allow its clad pipes to be cost competitive with epoxy coatings. “CermaClad is the only process that allows very thin metallurgical cladding on the inside of pipes with minimal dilution, which is impos- sible to achieve with any other metallurgical cladding technology,” he says. “We believe that cladding as thin as 200 microns on the inside diameter of pipes is possible. These would be cost competitive with epoxy coatings that are used for flow assurance, however, provide corrosion and abrasion resistance which is 20-50 times better than epoxies.” ❙
www.mesocoat.com
CONEXTRU GmbH
Engineering for extrusion
Purchase your next pipe tool via internet at:
www.conextru.eu/shop.html
Supports in:
• High output 40L/D extruder development • Supervision of engineering mono- or multilayer cross heads at end user
Delivers :
• Mono & multilayer cross heads for steel pipe coating up to 1200 mm
• Screw & feedbush system to up grade existing extruders
info@conextru.eu • Klosterstr. 19, 3011 Tullnerbach, Austria
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