Two-dimensional (2D) transition metal carbides, carbonitrides and nitrides (MXenes) represent a burgeoning group of 2D layered materials with widespread applications due to unique performance characteristics, in which titanium carbide (Ti₃C₂T_x) as corrosion inhibitor provides good physical barrier effect. Given that, as-prepared Ti₃C₂T_x MXene via chemical etching of titanium aluminium carbide (MAX) phase using HF/oxidants have good corrosion resistance of their own, but it is of inevitable importance to understand the effect of their hydrophilic surfaces and high electrical conductivities on corrosion of alloy substrate. Herein Ti₃C₂T_x MXene coating was prepared on mild steel substrate (Q345) to explore its corrosion behaviors in different conditions. The corrosion current density (i _corr) of MXene-coated Q345 was 6.39נ10^–6 A cm⁻², which was higher than that of uncoated Q345 sample (5.66נ10^–6 A cm⁻²). After 3 days of storage in wet environment of 40% and 90% relative humidity (RH) at 30 C, MXene-coated Q345 had suffered from a higher degree of spatially inhomogeneous corrosion, while the surface of uncoated substrate was still neat and glossy in spite of undergoing 1 month of storage under the same condition. The results demonstrate that Ti₃C₂T_x MXene accelerates the corrosion of Q345. Conductive and hydrophilic Ti₃C₂T_x could act as an electrode to propagate the charge generated by the oxidation of Fe, which forms a micro corrosion cell with substrate. Thus, the electrochemical corrosion process of substrate is accelerated.

二维 (2D) 过渡金属碳化物、碳氮化物和氮化物 (MXenes) 代表了一组新兴的二维层状材料，由于其独特的性能特点而具有广泛的应用，其中碳化钛 (Ti ₃ C ₂ T _x ) 作为腐蚀抑制剂提供了良好的性能。物理屏障效应。鉴于此，通过使用 HF/氧化剂化学蚀刻碳化钛铝 (MAX) 相制备的 Ti ₃ C ₂ T _x MXene 本身具有良好的耐腐蚀性，但了解其亲水表面的影响是不可避免的。以及对合金基体腐蚀的高导电性。这里Ti ₃ C ₂在低碳钢基材 (Q345) 上制备了T _x MXene 涂层，以探索其在不同条件下的腐蚀行为。MXene 涂覆的 Q345的腐蚀电流密度 ( i _corr ) 为 6.39 נ10 ^–6 A cm ^-2，高于未涂覆的 Q345 样品 (5.66נ10 ^–6 A cm ^-2 )。MXene 涂层 Q345 在 40% 和 90% 相对湿度 (RH) 30°C 的潮湿环境中存放 3 天后，空间不均匀腐蚀程度更高，而未涂层基材的表面在尽管在相同条件下经过 1 个月的存储。结果表明，Ti ₃ C ₂ T_x MXene 加速 Q345 的腐蚀。导电和亲水的 Ti ₃ C ₂ T _x可以作为电极来传播 Fe 氧化产生的电荷，从而与基体形成微腐蚀电池。因此，加速了基材的电化学腐蚀过程。