Investigation of tribological and corrosion performance of electroplated hard chromium coating on 17-4 PH steel

Ghosh, S. K.; Limaye, P. K.; Srivastava, C.; Sahu, A. K.

doi:10.1080/02670844.2023.2247862

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…The traditional aircraft actuator cylinder is usually made of stainless steel, and the inner surface of the cylinder is strengthened by electroplating hard chrome technology [1,2]. Due to high pollution, the electroplating hard chrome process has been gradually banned in aircraft manufacturing in many countries [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

Liu,

Li,

et al. 2024

Eng. Res. Express

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TC6 titanium alloy, also known as Ti-6Al-1.5Cr-2.5Mo, is one of the most widely used titanium alloys in the aerospace industry due to its high specific strength, corrosion resistance and excellent mechanical properties. However, its poor wear resistance limits its application in some situations, such as aircraft actuators. To improve its wear resistance, this paper performs ion nitriding treatment on TC6 titanium alloy for aircraft cylinder and studies its wear performance. The ion nitriding test is conducted for 16 h at 820°C using a bell-type titanium alloy ion nitriding furnace. The nitrided specimen is divided into three parts: nitrided layer, diffusion layer, and substrate layer. The nitrided layer was 4.11 μm thick and consisted of TiN and Ti2N phases. The diffusion layer was 13.69 μm thick and mainly composed of a gap solid solution formed by N element solid dissolved in α-Ti. After nitriding, the surface hardness of the specimen increased to 1105.2 HV, which is 2.37 times higher than that of the matrix. The hardness-affected layer is about 200 μm thick. The wear rate is reduced by 99.78 % compared with that of the matrix, indicating that ionic nitriding greatly improves the wear resistance of TC6 titanium alloy. The wear mechanism of the nitriding specimen differs from that of the matrix, mainly due to abrasive wear, while the wear mechanism of the matrix is a combination of adhesive wear and abrasive wear.

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Section: Introductionmentioning

confidence: 99%

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

Liu,

Li,

et al. 2024

Eng. Res. Express

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A comparison of heat treatment effect on structural and tribological properties of tungsten rich Ni-W and Ni-W-P alloy coatings

Srivastava,

Khare,

Limaye

et al. 2024

Tribology International

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Corrosion behaviour of nitroxy-QPQ additively manufactured 17-4 PH steel on marine and nuclear reactor components

Michla,

Rajkumar

2024

Surface Engineering

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The study investigates the corrosion behavior of untreated and nitroxy QPQ treated 17-4 PH stainless steel under NaCl environments. Potentiodynamic polarization tests reveal that the nitroxy layer forms an oxide coating, leading to a passivation phase with gradually increasing current density. Oxidation at different temperatures shows variation in corrosion potential, with the lowest current density observed at 450 °C, indicating enhanced corrosion resistance. SEM images of untreated steel show severe crevice and pitting corrosion, whereas nitroxy QPQ treated surfaces exhibit reduced corrosion, with minimal disturbance at 450 °C. Elemental analysis confirms the formation of oxides and nitrides, with increased oxygen content in oxide layers and decreased nitrogen content due to the formation of chromium nitrides. The oxide layer, enriched with oxygen, nitrogen, and chromium, acts as a passive film, protecting against corrosion even in NaCl environments. Elemental mapping further illustrates the correlation between oxidation temperature and corrosion resistance, with higher temperatures resulting in reduced corrosion rates. The combined nitriding and oxidation process enhances corrosion resistance by forming a dense and adherent oxide layer, serving as a barrier against corrosive agents.

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Investigation of tribological and corrosion performance of electroplated hard chromium coating on 17-4 PH steel

Cited by 3 publications

References 22 publications

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

A comparison of heat treatment effect on structural and tribological properties of tungsten rich Ni-W and Ni-W-P alloy coatings

Corrosion behaviour of nitroxy-QPQ additively manufactured 17-4 PH steel on marine and nuclear reactor components

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