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An Electrochemical Study of the Corrosion Resistance of Niobium-Aluminum Carbonitride Coating Produced on Steels by Thermo-Reactive Diffusion Technique

100%

Abakay E., Durmaz M., Sen S., Sen U.

Acta Physica Polonica A

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2017

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vol. 132

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issue 3

682-684

EN

Thermo-reactive diffusion/deposition technique is an alternative to physical vapor deposition and chemical vapor deposition techniques for obtaining wear and corrosion resistant coatings on steel parts. In this work, thermo-reactive diffusion/deposition technique was used to produce niobium aluminum carbonitride-based coatings on AISI M2 steel. Characterization of the coatings was done by X-ray diffraction analysis, scanning electron microscopy and energy dispersive spectroscopy. The corrosion resistance of the produced coatings was investigated by using potentiodynamic polarization in a solution of 0.5 M NaCl. Hard, compact and adherent coatings, mainly consisting of NbC and NbN phases were obtained. The corrosion behavior of the samples was investigation by potentiodynamic polarization measurements.

2

Effect of H₃BO₃ on the Corrosion Properties of Ni-B Based Electroplating Coatings

88%

Karabulut A., Durmaz M., Kilinc B., Sen U., Sen S.

Acta Physica Polonica A

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2017

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vol. 131

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issue 1

147-149

EN

In this study the effect of H₃BO₃ on the properties of Ni-B coating formed on the AISI 1020 steel surface produced with electroplating process was investigated. Synthesis of the coatings was done using acidic electro plating bath. Coating process was carried out within a standard cell with three electrode system using platinum as auxiliary and Ag/AgCl electrode as a reference electrode onto AISI 1020 steel substrate. Then, heat treatment was applied to coatings at 400°C during a period of 1 h. The coated samples were analyzed by optical microscope, scanning electron microscope, and X-ray diffraction. Micro hardness measurements of the coatings were realized. The study reveals that the Ni-B anti corrosion coating is amorphous in their as-plated condition and upon heat treatment at 400°C for 1 h, Ni-B coatings crystallize and produce nickel borides and nickel in the coatings. The results indicated the presence of Ni₂B, Ni₃B and Ni phases.

3

Structural Characterization of Boro-Titanized AISI 1040 Steel

88%

Kon O., Pazarlıoğlu S., Durmaz M., Sen U., Sen S.

Acta Physica Polonica A

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2015

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vol. 127

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issue 4

1211-1213

EN

In this study, boro-titanizing treatment was applied to AISI 1040 steel. In the coating treatment, steel samples were pre-boronized in a slurry salt bath consisting of borax, boric acid and ferro-silicon at 900°C for 2 h, then titanized by thermo-reactive deposition technique (TRD) in a powder mixture consisting of ferro-titanium, ammonium chloride, alumina and naphthalene at 1000°C for 1-4 h. The coated samples were characterized by X-ray diffraction analysis (XRD), scanning electron microscope (SEM), glow discharge optical emission spectroscopy (GDOES) and micro-hardness tests. Coated layer formed on the pre-boronized AISI 1040 steel was compact and homogeneous. X-ray studies showed that the phases formed on the steel surfaces are TiB₂, TiC, TiN and Fe₂B. The depth of the coating layer ranged from 3.41± 0.47 μm to 6.59± 0.51 μm, depending on treatment time. A higher treatment time resulted in a thicker boro-titanized layer. The average hardness of the coating layer was 4527± 284 HV_{0.005}.

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3 Acta Physica Polonica A

2 2017

1 2015

3 Durmaz M.

3 Sen S.

3 Sen U.

1 Abakay E.

1 Karabulut A.

1 Kilinc B.

1 Kon O.

1 Pazarlıoğlu S.

An Electrochemical Study of the Corrosion Resistance of Niobium-Aluminum Carbonitride Coating Produced on Steels by Thermo-Reactive Diffusion Technique

Effect of H₃BO₃ on the Corrosion Properties of Ni-B Based Electroplating Coatings

Structural Characterization of Boro-Titanized AISI 1040 Steel