深水油气装备材料应力腐蚀开裂敏感性研究

Study on stress corrosion cracking sensitivity of materials for deepwater oil and gas equipment

海洋深水油气装备长期工作在海水环境中,由于海水和高压的双重作用,电化学腐蚀中应力腐蚀开裂成为装备最主要的腐蚀失效形式之一。以深水油气装备材料为载体,基于慢应变速率拉伸的试验方法,进行水下材料应力腐蚀开裂试验研究。根据水下油气装备材料环境,采用“环境+电位模拟+材料”比对的方式,综合评判对比,利用试验数据优选材料为海洋油气装备防腐技术发展提供了支持。

Offshore oil and gas production equipment,especially in deep-sea areas,works in seawater for a long time.Due to the dual action of seawater and high pressure,stress corrosion cracking is one of the most important forms of corrosion failure.In this paper,stress corrosion cracking of underwater material was studied based on the slow strain rate test and the method of“environment&potential simulation&material”was adopted for comprehensive evaluation and comparison.The materials were optimized through test data analysis,which provided support for the development of anti-corrosion technology of offshore oil and gas equipment.