HDR双相不锈钢海水管路的腐蚀与预防

摘要

Electrochemical methods were used to study the corrosive characteristics of HDR duplex stainless steel in simulated seawater. The results showed that the corrosive potential and pitting potential of HDR duplex stainless steel were relatively positive, and the steel had favorable corrosive characteristic. When the steel is electrically with other common materials, serious galvanic corrosion will occur, because of the potential difference between HDR duplex stainless steel and other materials such as carbon steel, cast iron and brass. The key for prevending galvanic corrosion is effective and complete electric insulation between HDR duplex stainless steel and accessories made of other materials can solve corrosion in seawater pipeline system of HDR duplex stainless steel.%利用电化学方法,研究了HDR双相不锈钢在人工海水中的腐蚀特性.结果表明,HDR双相不锈钢的自腐蚀电位、点蚀电位较正,具有良好的耐腐蚀特性；与常用材料组成电偶对时,因HDR钢与碳钢、铸铁、黄铜等材料电位相差较大,会发生严重的电偶腐蚀.解决HDR不锈钢海水管路系统的腐蚀,关键是将HDR双相不锈钢与其它金属件之间进行有效的、完全的电绝缘隔离,才能防止电偶腐蚀.