A recent report published by the New Zealand Transport Investigation Commission has once again highlighted the dangers associated with plastic coating or sheathing on wire ropes. During the recovery of a lifeboat, a wire sling parted and the lifeboat fell several meters back into the water from deck level. Fortunately, in this particular case, only one of the four crew members on board the boat during the recovery was injured.
The subsequent investigation found that the lifting wire had been corroded by seawater penetrating and accumulating under the plastic sheathing. The condition of the plastic was such that it did not allow a robust examination or inspection to be completed as per manufacturer’s instructions and the vessel’s planned maintenance schedule. The existence of the plastic sheathing also prevented the application of anti-corrosive coating which is important to both protect, and prolong, a wire’s working life.
See attached file: Lifeboat Wires – Do You Have a Hidden Problem.pdf
救生艇钢丝绳 – 是否存有隐患
新西兰交通事故调查委员会在最新的报告中，再次强调了钢丝绳塑料涂层或保护套可能存在的危险。一艘救生艇在回收的过程中，钢丝绳吊索断开，救生艇从甲板平面，坠落数米到海面。所幸救生艇所载四名船员中只有一名船员在事故中受伤。
后续调查发现，吊艇钢丝绳因海水渗透而被腐蚀，腐蚀状况在塑料保护套内逐渐加剧。钢丝绳在使用塑料保护套的情况下，无法根据厂商指示或船舶维护计划，进行鲁棒性(robust)检查或检验。此外，塑料保护套阻碍了防腐涂层的使用，而防腐涂层在保护和延长钢丝绳使用寿命方面起着非常重要的作用。
详细信息请参阅附件。
