对镀铬件的镀铬层进行着色渗透检测时，存在表面多余渗透剂清洗、显像剂喷涂、缺陷迹痕评定困难等问题。通过工艺试验，制作了显像剂喷涂辅助工具，确定了镀铬层着色渗透检测工艺参数，并结合显示解剖分析了结果，了解了几种主要缺陷迹痕显示的形式和性质。同时提出了在镀铬层着色渗透检测过程中应注意的问题，也为同行提供参考。

When chrome-plating layer of chrome-plated parts is inspected by dye penetration, there are some problems such as cleaning of excess permeable fluid on the surface, spraying of imaging agent and difficulty in evaluating defect trace. Through the process practice research, the auxiliary tools of developing agent spraying were made, the process parameters of chrome-plating layer coloration and penetration inspection were determined, and the forms and properties of several main defect trace display were understood. At the same time, some problems that should be paid attention to in the process of chrome-plating layer dye penetration inspection are put forward, which provides reference for peers.