Figure Source Data Sets for: "Electrochemical and Tribological Performance of Hybrid 60 and AISI 52100 Bearing Steels in Water-Based Lubricants"

Data description – Figure 2: Open Circuit Potential (OCP) evolution

This dataset contains time-resolved open circuit potential (OCP) measurements for AISI 52100 and Hybrid 60 bearing steels immersed in a water-based lubricant. The data record the evolution of OCP over a 12-hour period under hydrodynamic conditions at room temperature. OCP values are reported as a function of immersion time, starting immediately after the electrode was submerged in the lubricant. The measurements capture the transient electrochemical stabilization of both steels and reflect the development of surface films and changes in electrochemical activity over time.

Units:

Time, hours (h)

Open circuit potential, volts vs. Ag/AgCl (V)

Data description – Figure 3: Potentiodynamic (Tafel) polarization data

This dataset contains potentiodynamic polarization measurements obtained for AISI 52100 and Hybrid 60 bearing steels in a water-based lubricant. The data include polarization curves recorded under both stagnant conditions (0 rpm) and hydrodynamic conditions (2300 rpm), as well as measurements performed at different temperatures (25 °C and 40 °C). The dataset consists of electrode potential values (referenced to Ag/AgCl) as a function of logarithmic current density.

Units:

Electrode potential, volts vs. Ag/AgCl (V)

Current density, microamperes per square centimeter (µA/cm²)

Data description – Figure 6: Friction coefficient versus time

This dataset contains friction coefficient measurements obtained on a ball-on-disc tribological tests for AISI 52100 and Hybrid 60 bearing steels lubricated with a water-based lubricant. The tests were conducted using a Mini Traction Machine (MTM) under a constant normal load corresponding to a maximum Hertzian contact pressure of approximately 1.2 GPa and at a lubricant temperature of 40 °C.

The friction coefficient was recorded over a total test duration of 12 hours.

Units:Time, hours (h)Friction coefficient, dimensionless (–)

数据说明——图2：开路电位（Open Circuit Potential, OCP）演化

本数据集包含AISI 52100与Hybrid 60轴承钢浸入水基润滑剂后的时间分辨开路电位测量数据。该数据记录了室温下流体动力条件下，12小时时长内开路电位的演化过程。开路电位值以浸入时间为自变量给出，测量起始于电极浸入润滑剂的瞬间。本次测量捕捉了两种钢材的瞬态电化学稳定过程，反映了表面膜层的形成与电化学活性随时间的变化。

单位：
时间：小时（h）
开路电位：相对于Ag/AgCl的伏特（V）

数据说明——图3：动电位（Potentiodynamic, Tafel）极化数据

本数据集包含AISI 52100与Hybrid 60轴承钢在水基润滑剂中的动电位极化测量数据。数据涵盖了静态条件（0 rpm）与流体动力条件（2300 rpm）下记录的极化曲线，以及不同温度（25 ℃与40 ℃）下的测量结果。该数据集包含以对数电流密度为自变量的电极电位值（相对于Ag/AgCl参比电极）。

单位：
电极电位：相对于Ag/AgCl的伏特（V）
电流密度：微安每平方厘米（µA/cm²）

数据说明——图6：摩擦系数随时间的变化

本数据集包含采用球盘摩擦试验测得的、以水基润滑剂润滑的AISI 52100与Hybrid 60轴承钢的摩擦系数数据。试验采用迷你牵引试验机（Mini Traction Machine, MTM）完成，施加的恒定法向载荷对应约1.2 GPa的最大赫兹接触压力，润滑剂温度设定为40 ℃。摩擦系数的总测试时长为12小时。

单位：
时间：小时（h）
摩擦系数：无量纲（–）