船用重组木耐久性评价  

Durability Evaluation of Marine Scrimber

作　　者：马琪 周一梁 卢良 MA Qi;ZHOU Yiliang;LU Liang(Jiangnan Institute of Technology,Jiangnan Shipyard(Group)Co.,Ltd.,Shanghai 201913,China)

机构地区：[1]江南造船(集团)有限责任公司江南研究院,上海201913

出　　处：《船舶与海洋工程》2024年第5期76-81,共6页Naval Architecture and Ocean Engineering

摘　　要：针对船用垫块和铺板易老化腐蚀等突出问题,采用人工加速老化试验方法对重组木、桦木胶合板和松木等3种试样进行耐久性评价。从力学强度、质量损失率和表面状态等方面进行分析,结果表明老化后3种试样的力学性能均呈下降趋势,但重组木具有较高的力学强度保持率,其硬度、抗压强度和抗弯强度分别为70.5HD、54.74 MPa和102.18 MPa,下降率仅为12.8%、25.72%和33.9%。对3种试样的微观结构和化学成分进行剖析,结果表明:老化后重组木的形貌并未发生明显变化,而桦木和松木均出现一定程度的缺陷;老化后3种试样仅在表面出现轻微的降解,产生羰基官能团及其衍生物,并未诱导多糖或更深层次结构的分解;在垂直燃烧试验中,重组木能实现离火自熄且无滴落物产生,而松木存在明显的火芯。In response to prominent issues such as aging and corrosion of marine cushion blocks and planks,a manual accelerated aging test method is used to evaluate the durability of three types of specimens,i.e.,scrimber,birch plywood,and pine wood.From the aspects of mechanical strength,mass loss rate and surface state,the results show that the mechanical properties of the three specimens all show a downward trend after aging.However,the scrimber has a high mechanical strength retention rate,with hardness,compressive strength,and flexural strength of 70.5HD,54.74 MPa,and 102.18 MPa after aging,respectively,corresponding to a decrease rate of only 12.8%,25.72%,and 33.9%.The microstructure and chemical composition of the three samples are analyzed,and the results show that the morphology of the scrimber does not change significantly after aging,while birch and pine wood both exhibit certain degrees of defects.The three samples only experienced slight degradation on the surface,producing carbonyl functional groups and derivatives,without inducing the decomposition of polysaccharides or deeper structures.In the vertical combustion test,scrimber can achieve self-extinguishing without dripping,while pine wood has a clear fire core.

关 键 词：重组木 加速老化 耐久性 力学性能 机理 

分 类 号：U668.5[交通运输工程—船舶及航道工程]