本文介绍一种新的无损检验仪器,它用来测定化肥厂的列管换热器(汽提塔、高压甲胺冷凝器、高压洗涤器)的受腐蚀情况。本文介绍磁探仪的检测原理、方法、探头和仪器,还列举了实验室实验结果以及技术数据。此种测量方法简单,检测速度快、准确可靠。实验证明·它也适用于冶金工业、石油工业的管板腐蚀的无损检验工作。 This article describes a new non-destructive testing instrument that is used to determine the corrosive conditions of the heat exchanger (stripper, high pressure methylamine condenser, high pressure washer) of a fertilizer plant. This article describes the detection principle of magnetic detectors, methods, probes and instruments, but also lists the laboratory test results and technical data. This measurement method is simple, fast detection, accurate and reliable. Experiments show that it is also suitable for nondestructive testing of the corrosion of tube sheets in the metallurgical industry and the petroleum industry.