鉴于某型舰用锅炉过热器破损的主因在于其内部腐蚀，而破损的主要方式是由管头的溃烂开始直至整个管头烂掉为止，导致管子的胀接松动而漏泄。因此，过热器的使用年限全取决于管头的腐蚀速度。通过确定过热器内管头的腐蚀率、锅炉年内运行时间以及保养时间等要素来估算过热器的使用寿命。 In view of a type of ship boiler superheater damage is due to its internal corrosion, and the main way of damage is from the beginning of the tube fester until the entire pipe head rot, leading to expansion of the pipe loose and leakage. Therefore, the useful life of the superheater depends entirely on the corrosion rate of the pipe head. The service life of the superheater is estimated by determining the corrosion rate of the header inside the superheater, the operating hours of the boiler during the year, and the maintenance time.