换热器腐蚀机理分析

Corrosion Mechanism Analysis of Heat Exchanger

换热器是石化企业常用的设备之一。换热器损坏的主要原因之一是腐蚀开裂,腐蚀类型主要包括湿硫化氢环境腐蚀、碱腐蚀、硝酸盐应力腐蚀、氯化物应力腐蚀、连多硫酸腐蚀、金属尘化腐蚀等。文章对通过对换热器维修过程中发现的各类腐蚀因素的分析,揭示了腐蚀产生的机理条件。

In the maintenance of heat exchanger,corrosion cracking is one of the main reasons for maintenance,mainly including wet hydrogen sulf ide environment corrosion,alkali corrosion,nitrate stress corrosion,chloride stress corrosion,even more sulfuric acid corrosion,metal dust corrosion.The paper analyses each factor of corrosion,reveals the mechanism and condition of corrosion.