【摘要】 因设备简单、镀层致密、成分和厚度可控、绕镀性强等优点，电沉积涂层技术在管件(特别是异形件)的内壁改性和防护方面得到了广泛应用。然而，相对于外表面，管件内壁电沉积技术面临更大的挑战，具有阴/阳极面积比大、内角难以涂覆、涂层厚度不均匀、存在局部过热或温度梯度等技术难点。工程上，常采用精细化象形阳极设计及合理的前处理方法优化电沉积工艺参数(如电流密度、电流效率、镀液温度、搅拌速率等),以获得均匀致密的涂层。鉴于此，本文简要分析和评述了管件内壁电沉积的技术特点、影响因素及工程化应用，以期能为相关基础研究和工程实践提供参考和指导。更多还原

【Abstract】 The electrodeposition technique is widely adopted for the inner wall modification and protection for pipe workpieces, especially for those with complex geometry. This technique is possessed of the following advantages of simple facilities required, dense coatings, controllable composition and thickness, and good platability, etc. However, compared with the technique for the outer surface treatment, greater challenges will emerge for the inner wall electrodeposition of pipe workpieces, such as large area ratio of cathode/anode, difficulty in coating the inner corners, inhomogeneity of coating thickness, and existence of local overheating or temperature gradation, etc. In order to obtain homogenous and dense coatings in the engineering practice, a fine designed conformable anode and appropriate treating method prior to plating are commonly employed, accompanied by optimizing the electrodeposition parameters like the current density, current efficiency, electrolyte temperature and stirring rate, etc. The characteristics, influence factors and engineering applications of inner wall electrodeposition technique of pipe workpieces are thus reviewed, expecting to provide some reference and guideline for related fundamental research and engineering practice.更多还原