Tribocorrosion study of Ni/B electrodeposits with low B content

The Ni/B electrodeposits are prospective candidates for a wide range of applications that require both high mechanical and corrosion properties. The objective of this work was to study the tribocorrosion behaviour of Ni/B alloy coatings with low B content obtained by electrodeposition. Specimens con...

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Veröffentlicht in:Surface & coatings technology 2019-07, Vol.369, p.1-15
Hauptverfasser: Offoiach, R., Lekka, M., Lanzutti, A., Martínez-Nogués, V., Vega, J.M., García-Lecina, E., Fedrizzi, L.
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container_end_page 15
container_issue
container_start_page 1
container_title Surface & coatings technology
container_volume 369
creator Offoiach, R.
Lekka, M.
Lanzutti, A.
Martínez-Nogués, V.
Vega, J.M.
García-Lecina, E.
Fedrizzi, L.
description The Ni/B electrodeposits are prospective candidates for a wide range of applications that require both high mechanical and corrosion properties. The objective of this work was to study the tribocorrosion behaviour of Ni/B alloy coatings with low B content obtained by electrodeposition. Specimens containing 0.04 wt%, 0.06 wt% and 0.1 wt% have been produced using a Ni sulfamate “High Speed” plating bath with the addition of different concentration of DMAB (dimethylaminborane). Both Ni/B coatings, and pure Ni coatings as reference, have been characterized regarding their chemical composition, microstructure and hardness. The tribocorrosion resistance has been evaluated performing sliding wear tests in a ball on disc configuration using a 3.5wt% NaCl solution as electrolyte. Three different types of tribocorrosion tests were performed: in open circuit condition, under potentiodynamic polarization and under potentiostatic polarization, both cathodic and anodic. The wear tracks were analysed by profilometer to determine the volume loss and by SEM both in top view and cross section to better understand the tribocorrosion mechanisms. Ni/B coatings with 0.1wt% of B are not protective against tribocorrosion due to the presence of cracks formed by excessive internal stresses. Crack free Ni/B coatings with 0.04wt% and 0.06wt% of B present always a better tribocorrosion behaviour with respect to pure Ni coatings due to their higher hardness. The pure Ni wear tracks present always a thick tribological layer composed by worn and oxidized material and the subsurface is strongly deformed, due to the higher ductility. Ni/B coatings do not present any plastic deformation in all testing conditions and the tribological layer, when formed, is very thin. The plastic deformation and the presence or absences of the tribological layer affect the overall tribocorrosion process. •Pure Ni and Ni/B coatings with low B content were produced by electrodeposition.•Coatings with B content up to 0.06 wt% present no cracks and a grain refinement.•The coatings tribocorrosion was tested under OCC, cathodic and anodic polarization.•Crack free Ni/B coatings have better tribocorrosion resistance in all conditions.•Crack free Ni/B coatings present no plastic deformation and thin tribological layer.
doi_str_mv 10.1016/j.surfcoat.2019.04.047
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The objective of this work was to study the tribocorrosion behaviour of Ni/B alloy coatings with low B content obtained by electrodeposition. Specimens containing 0.04 wt%, 0.06 wt% and 0.1 wt% have been produced using a Ni sulfamate “High Speed” plating bath with the addition of different concentration of DMAB (dimethylaminborane). Both Ni/B coatings, and pure Ni coatings as reference, have been characterized regarding their chemical composition, microstructure and hardness. The tribocorrosion resistance has been evaluated performing sliding wear tests in a ball on disc configuration using a 3.5wt% NaCl solution as electrolyte. Three different types of tribocorrosion tests were performed: in open circuit condition, under potentiodynamic polarization and under potentiostatic polarization, both cathodic and anodic. The wear tracks were analysed by profilometer to determine the volume loss and by SEM both in top view and cross section to better understand the tribocorrosion mechanisms. Ni/B coatings with 0.1wt% of B are not protective against tribocorrosion due to the presence of cracks formed by excessive internal stresses. Crack free Ni/B coatings with 0.04wt% and 0.06wt% of B present always a better tribocorrosion behaviour with respect to pure Ni coatings due to their higher hardness. The pure Ni wear tracks present always a thick tribological layer composed by worn and oxidized material and the subsurface is strongly deformed, due to the higher ductility. Ni/B coatings do not present any plastic deformation in all testing conditions and the tribological layer, when formed, is very thin. The plastic deformation and the presence or absences of the tribological layer affect the overall tribocorrosion process. •Pure Ni and Ni/B coatings with low B content were produced by electrodeposition.•Coatings with B content up to 0.06 wt% present no cracks and a grain refinement.•The coatings tribocorrosion was tested under OCC, cathodic and anodic polarization.•Crack free Ni/B coatings have better tribocorrosion resistance in all conditions.•Crack free Ni/B coatings present no plastic deformation and thin tribological layer.</description><identifier>ISSN: 0257-8972</identifier><identifier>EISSN: 1879-3347</identifier><identifier>DOI: 10.1016/j.surfcoat.2019.04.047</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Anodic polarization ; Cathodic polarization ; Chemical composition ; Coated electrodes ; Cracks ; Deformation mechanisms ; Electrodeposition ; Frictional wear ; Grain refinement ; Low B content ; Ni/B coatings ; Nickel coatings ; Organic chemistry ; Plastic deformation ; Plating baths ; Profilometers ; Protective coatings ; Residual stress ; Sliding friction ; Tribocorrosion ; Tribology ; Wear mechanisms</subject><ispartof>Surface &amp; coatings technology, 2019-07, Vol.369, p.1-15</ispartof><rights>2019 Elsevier B.V.</rights><rights>Copyright Elsevier BV Jul 15, 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c340t-2e5e1f45af82db063b95f33f71a9f3d4a9f5d1cd1e73bbe458dfd627a6f9d98c3</citedby><cites>FETCH-LOGICAL-c340t-2e5e1f45af82db063b95f33f71a9f3d4a9f5d1cd1e73bbe458dfd627a6f9d98c3</cites><orcidid>0000-0001-6811-3843</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.surfcoat.2019.04.047$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Offoiach, R.</creatorcontrib><creatorcontrib>Lekka, M.</creatorcontrib><creatorcontrib>Lanzutti, A.</creatorcontrib><creatorcontrib>Martínez-Nogués, V.</creatorcontrib><creatorcontrib>Vega, J.M.</creatorcontrib><creatorcontrib>García-Lecina, E.</creatorcontrib><creatorcontrib>Fedrizzi, L.</creatorcontrib><title>Tribocorrosion study of Ni/B electrodeposits with low B content</title><title>Surface &amp; coatings technology</title><description>The Ni/B electrodeposits are prospective candidates for a wide range of applications that require both high mechanical and corrosion properties. The objective of this work was to study the tribocorrosion behaviour of Ni/B alloy coatings with low B content obtained by electrodeposition. Specimens containing 0.04 wt%, 0.06 wt% and 0.1 wt% have been produced using a Ni sulfamate “High Speed” plating bath with the addition of different concentration of DMAB (dimethylaminborane). Both Ni/B coatings, and pure Ni coatings as reference, have been characterized regarding their chemical composition, microstructure and hardness. The tribocorrosion resistance has been evaluated performing sliding wear tests in a ball on disc configuration using a 3.5wt% NaCl solution as electrolyte. Three different types of tribocorrosion tests were performed: in open circuit condition, under potentiodynamic polarization and under potentiostatic polarization, both cathodic and anodic. The wear tracks were analysed by profilometer to determine the volume loss and by SEM both in top view and cross section to better understand the tribocorrosion mechanisms. Ni/B coatings with 0.1wt% of B are not protective against tribocorrosion due to the presence of cracks formed by excessive internal stresses. Crack free Ni/B coatings with 0.04wt% and 0.06wt% of B present always a better tribocorrosion behaviour with respect to pure Ni coatings due to their higher hardness. The pure Ni wear tracks present always a thick tribological layer composed by worn and oxidized material and the subsurface is strongly deformed, due to the higher ductility. Ni/B coatings do not present any plastic deformation in all testing conditions and the tribological layer, when formed, is very thin. 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The objective of this work was to study the tribocorrosion behaviour of Ni/B alloy coatings with low B content obtained by electrodeposition. Specimens containing 0.04 wt%, 0.06 wt% and 0.1 wt% have been produced using a Ni sulfamate “High Speed” plating bath with the addition of different concentration of DMAB (dimethylaminborane). Both Ni/B coatings, and pure Ni coatings as reference, have been characterized regarding their chemical composition, microstructure and hardness. The tribocorrosion resistance has been evaluated performing sliding wear tests in a ball on disc configuration using a 3.5wt% NaCl solution as electrolyte. Three different types of tribocorrosion tests were performed: in open circuit condition, under potentiodynamic polarization and under potentiostatic polarization, both cathodic and anodic. The wear tracks were analysed by profilometer to determine the volume loss and by SEM both in top view and cross section to better understand the tribocorrosion mechanisms. Ni/B coatings with 0.1wt% of B are not protective against tribocorrosion due to the presence of cracks formed by excessive internal stresses. Crack free Ni/B coatings with 0.04wt% and 0.06wt% of B present always a better tribocorrosion behaviour with respect to pure Ni coatings due to their higher hardness. The pure Ni wear tracks present always a thick tribological layer composed by worn and oxidized material and the subsurface is strongly deformed, due to the higher ductility. Ni/B coatings do not present any plastic deformation in all testing conditions and the tribological layer, when formed, is very thin. The plastic deformation and the presence or absences of the tribological layer affect the overall tribocorrosion process. •Pure Ni and Ni/B coatings with low B content were produced by electrodeposition.•Coatings with B content up to 0.06 wt% present no cracks and a grain refinement.•The coatings tribocorrosion was tested under OCC, cathodic and anodic polarization.•Crack free Ni/B coatings have better tribocorrosion resistance in all conditions.•Crack free Ni/B coatings present no plastic deformation and thin tribological layer.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.surfcoat.2019.04.047</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0001-6811-3843</orcidid></addata></record>
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subjects Anodic polarization
Cathodic polarization
Chemical composition
Coated electrodes
Cracks
Deformation mechanisms
Electrodeposition
Frictional wear
Grain refinement
Low B content
Ni/B coatings
Nickel coatings
Organic chemistry
Plastic deformation
Plating baths
Profilometers
Protective coatings
Residual stress
Sliding friction
Tribocorrosion
Tribology
Wear mechanisms
title Tribocorrosion study of Ni/B electrodeposits with low B content
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