Vol 7, No 3 (2016) > Metalurgy and Material Engineering >

Crevice Corrosion Study of SAF 3207 HD in 6% FeCl3 Solution using Polarization, Weight Loss, and Electrochemical Impedance Spectroscopy Methods

Rini Riastuti, Mega Herawati Arifiana Amanah Notonegoro, Adam Hidana Yudo Saputro



Hyperduplex Stainless
Steel 3207 (SAF 3207 HD) is one of the materials used in the oil and gas
industry, especially for umbilical, which is a system to connect cables or
instrumental setups between control platforms and wellhead station. It is used
in deep water containing high chloride ion (Cl-), so it needs high
tensile strength and must be a highly corrosion-resistant material. In this
research, several corrosion resistance tests were conducted on 3207 hyperduplex
stainless steel such as polarization and weight loss testing. Roughness surface
tests were carried out to observe alterations to the surface caused by
underwater corrosion. SAF 3207 HD can form a passive layer due to an
environmental reaction; to observe this phenomenon, an EIS test was conducted
at the interface of the material. The weight loss test was conducted on a particular sample, in accordance
with ASTM G48-97 method B. The corrosion test was carried out at temperatures
of 60-90°C (at 5°C intervals) in 6% FeCl3 solution. The results
show that SAF 3207 HD has good crevice corrosion resistance, although crevices
were not seen below temperatures of 70oC, which is known as critical
crevice temperature. At this temperature, the corrosion rate reached 10.032
mm/year and the crevice depth was 1.034 μm. This means that the operating
temperature of the umbilical can be increased up to 70oC.

Keywords: Corrosion; Crevice; EIS ; Hyperduplex stainless steel; Polarization

Full PDF Download


ASTM G48-97, 1997. Standard Test Method for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution, Annual Book of ASTM Standards, Volume 01.02, New York

Chai, G., Kivisäkk, U., Tokaruk,J., Eidhagen, J., 2009. Hyperduplex Stainless Steel for Deep Subsea Applications.Stainless Steel World, R&D Center, PA Tube, Sandvik Materials Technology, Sweden

Chai, G., Kivisäkk, U., Tokaruk, J., Eidhagen, J., 2009. A New Hyper Duplex Stainless Steel for Umbilicals, In: the Proceedings of the NACE International Corrosion Conference and Expo, pp. 27–33

Conejero, O., Palacios, M., Rivera, S., 2009. Premature Corrosion Failure of a 316L Stainless Steel Plate due to the Presence of Sigma Phase. Engineering Failure Analysis, Volume 16(3), pp. 669–704

Endean, H.J., 1989. Oil Field Corrosion Control Detection and Control, Champion Chemical, Inc., Texas

Escrivà-Cerdán, C., Blasco-Tamarit,C.E., García-García,D.M., García-Antón, J., Ben-Bachir, A., 2012. Temperature Effect on Corrosion Behaviour of Alloy 31 in Polluted H3PO4 and Analysis of the Corrosion by Laser Raman, Microscope.J. Electrochem. Soc, Volume 7, pp. 5754–5764

Escrivà-Cerdán, C., Blasco, E., Dionisa, M., Guenbour, A., 2013. Temperature Effect on the Austenitic Stainless Steel UNS N08031 used in the Wet Method of Phosphoric Acid Production, Chemical Engineering Transaction, Volume 32, pp 1717–1722

Fontana, M.G., 1991. Corrosion Engineering, 2nd ed., Mc Graw-Hill International, Singapore

Jones, D.A., 1992. Principles and Prevention of Corrosion, Macmillan Publishing Company, New York