Menu
Search
Filters
Close
Menu

51318-11155-Corrosion Behavior of Powder Metallurgical Cobalt-Based Alloys in Hydrochloric Acid

Picture for Corrosion Behavior of Powder Metallurgical Cobalt-Based Alloys in Hydrochloric Acid
Available for download

Cobalt-based alloys containing Cr-Ni-Mo-W-Co ingredients were produced and their corrosion behavior in hydrochloric acid was investigated using potentiodynamic polarization (PDP) curves, electrochemical impedance spectroscopy (EIS) measurements and immersion corrosion tests.

Product Number: 51318-11155-SG
Author: Jinhui Ding / Yuexiang Zhang
Publication Date: 2018
Industry: Science of Corrosion
$0.00
$20.00
$20.00

Cobalt-based alloys, though possessing relevant resistance to oxidation and erosion, inevitably encounter corrosion in acidic environments. In this paper, the cobalt-based alloys containing Cr-Ni-Mo-W-Co ingredients were produced by hot isostatic pressing (HIP) method and their corrosion behavior in hydrochloric acid was investigated using potentiodynamic polarization (PDP) curves, electrochemical impedance spectroscopy (EIS) measurements and immersion corrosion tests. Post-test, the alloys surface was characterized by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD), the ions concentration in corrosion solution was characterized by inductively coupled plasma (ICP). The results indicated that corrosion resistance of three alloys follows the order 3.0Mo > 1.0Mo > 0.5Mo. During corrosion process, constituent Ni, Fe, Cr and Co in base material tend to dissolve preferentially, while carbides precipitates will be protected due to galvanic coupling in hydrochloric acid solution. Different alloy constituents and microstructures will result in different corrosion behaviors.

Key words: Cobalt-Based Alloys, Hydrochloric Acid, Hot Isostatic Pressing (HIP), corrosion behavior

Cobalt-based alloys, though possessing relevant resistance to oxidation and erosion, inevitably encounter corrosion in acidic environments. In this paper, the cobalt-based alloys containing Cr-Ni-Mo-W-Co ingredients were produced by hot isostatic pressing (HIP) method and their corrosion behavior in hydrochloric acid was investigated using potentiodynamic polarization (PDP) curves, electrochemical impedance spectroscopy (EIS) measurements and immersion corrosion tests. Post-test, the alloys surface was characterized by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD), the ions concentration in corrosion solution was characterized by inductively coupled plasma (ICP). The results indicated that corrosion resistance of three alloys follows the order 3.0Mo > 1.0Mo > 0.5Mo. During corrosion process, constituent Ni, Fe, Cr and Co in base material tend to dissolve preferentially, while carbides precipitates will be protected due to galvanic coupling in hydrochloric acid solution. Different alloy constituents and microstructures will result in different corrosion behaviors.

Key words: Cobalt-Based Alloys, Hydrochloric Acid, Hot Isostatic Pressing (HIP), corrosion behavior

Product tags
Also Purchased
Picture for Preliminary corrosion testing of explosive cladded materials in geothermal environment
Available for download

51318-11154-Preliminary corrosion testing of explosive cladded materials in geothermal environment

Product Number: 51318-11154-SG
Author: Kolbrun R. Ragnarsdottir / Sigrun N. Karlsdottir / Aðalsteinn Arnbjornsson / Helen O. Haraldsdottir
Publication Date: 2018
$20.00

Austenitic stainless, S31254, and Hastelloy, N10276, were clad on low carbon steel plates with explosive welding for testing in a geothermal environment. Results from visual inspection and microstructural & chemical composition analysis with a scanning electron microscopy and X-ray energy dispersive spectroscopy  
Picture for Corrosion Resistance of High Strength UNS S31010 High Nitrogen Stainless Steel
Available for download

51318-11161-Corrosion Resistance of High Strength UNS S31010 High Nitrogen Stainless Steel

Product Number: 51318-11161-SG
Author: Luca Foroni / Louis Lherbier / Carlo Malara
Publication Date: 2018
$20.00

High strength UNS S31010 with 140 ksi MYS has been produced by warm work hardening and cold work hardening. The characterization of high strength alloy with respect to corrosion resistance is discussed in this paper.
Picture for Evaluation of Corrosion of Austenitic Steels and Comparison with Martensitic Stainless Steel 17-4
Available for download

51318-11163-Evaluation of Corrosion of Austenitic Steels and Comparison with Martensitic Stainless Steel 17-4

Product Number: 51318-11163-SG
Author: Tatiana R. Ayers, Manuel P. Marya, Dean Lauppe
Publication Date: 2018
$20.00

A series of NACE TM0177 Tensile Test Method A tests were conducted on various commercially available chromium-manganese austenitic stainless steels as well as 17-4PH in the 110ksi-to-130ksi yield strength range (34 - 35 HRC max).
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support