In this study, electroless plating of nickel, copper, and silver is applied to stainless steel 316 (SUS316) plate heat exchanger (PHE) to enhance thermal-hydraulic efficiency. The electroless plating experiment was first performed on small samples (30 × 30 × 1 mm) to determine optimum control parameters, i.e. solution concentration, current density, etching time prior to commercial PHE. The characteristics of the coating surfaces were indicated by static contact angle, thermal shock, roughness profile, Vickers hardness, SEM images, and EDS analysis. In order to research the effect of each electroless coating on PHE performance, a single-phase water flow heat transfer experiment was performed. The thermal-hydraulic efficiency was evaluated using the Overall Heat Transfer Coefficient (OHTC), Friction Factor, Number of Transfer Units (NTU), effectiveness and Performance of Evaluation Criterion (PEC). As a consequence, aqua regia solution with a volumetric ratio of 1HNO₃: 2HCl: 75H₂O, a current density of 0.1 A/cm² and a 12-min etching were determined to be the optimum process parameters for optimizing surface area and minimizing mass loss. After electroless coating, the surface was completely changed from smooth to rough, resulting in a change from hydrophobicity to hydrophobicity, as well as a change in surface morphology. More significantly, all coated PHEs displayed a substantial increase in their performance, as shown by PEC ranging from 1.21 to 1.30 in the case of Silver-coated PHE, followed by 1.20–1.24 and 1.11–1.15 in the case of Copper and Nickel respectively.

在这项研究中，镍，铜和银的化学镀应用于不锈钢316（SUS316）板式换热器（PHE），以提高热工效率。首先在小样本（30×30×1 mm）上进行化学镀实验，以确定最佳的控制参数，即溶液浓度，电流密度，商业化PHE之前的蚀刻时间。涂层表面的特性由静态接触角，热冲击，粗糙度轮廓，维氏硬度，SEM图像和EDS分析表示。为了研究每种化学镀层对PHE性能的影响，进行了单相水流传热实验。使用总传热系数（OHTC），摩擦系数，传热单位数（NTU）评估热工液压效率 评估标准（PEC）的有效性和绩效。结果，王水溶液的体积比为1HNO_确定3：2HCl：75H ₂ O，0.1 A / cm ²的电流密度和12分钟的蚀刻是优化表面积和减少质量损失的最佳工艺参数。化学镀覆后，表面完全从光滑变为粗糙，导致从疏水性变为疏水性，以及表面形态发生变化。更重要的是，所有镀膜的PHE的性能都显着提高，如PEC所示，镀银的PHE在1.21至1.30之间，铜和镍分别为1.20–1.24和1.11–1.15。