中国南海油气田开发采用玻璃钢防护罩，保护水下生产系统的关键设施。玻璃纤维增强复合材料（玻璃钢）是目前最为常用的复合材料，广泛应用于船舶与海洋工程领域。本文通过建立玻璃钢耐海水腐蚀寿命模型，定义弯曲强度保持率，得到耐海水腐蚀寿命通用方程和深海低温条件下耐海水腐蚀寿命公式。结合常温和高温海水长期浸泡条件下的弯曲强度试验结果，预测得到玻璃纤维增强乙烯基酯复合材料在0~4℃海水温度范围内的耐腐蚀寿命约为12.28~16.55年。从弯曲强度的角度来看，耐腐蚀寿命较短，建议应用在承受低弯曲载荷的部位。

Fiber reinforced plastics shields are used in the development of offshore oil and gas fields in the South China Sea to protect critical facilities in underwater production systems. Fiberglass (FRP) is the most commonly used composite material， widely used in Marine and ocean engineering fields. By establishing the seawater corrosion resistance life model and defining the bending strength retention rate， the general equation of seawater corrosion resistance life and the seawater corrosion resistance life formula under deepsea low temperature conditions are obtained. Based on the flexural strength test results of longterm immersion in seawater at room temperature and high temperature， from the point of view of bending strength， corrosion resistance is short. it is predicted that the corrosion resistance life of glass fiber reinforced vinyl ester composites in the seawater temperature range of 0-4℃ is about 12.28-16.55 years for applications subject to low bending loads.