Miao Xiaojin, Zhang Chunlei, Wu Meiping, Ma Chenglong, Wang Quanlong
Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, China.
Fasten Group Co., Ltd, Wuxi, 214433, China.
Sci Rep. 2022 Jun 11;12(1):9680. doi: 10.1038/s41598-022-13955-y.
Traditional cleaning processes may be banned in the near future because of the hazards they pose to the environment. In this study, a water jet was used to clean grease residues from steel wires for the first time. The EDS and SEM results of the steel wire rope surfaces and supplementary water jet impact experiments on galvanized steel plates revealed that when the pressure was lower than 50 MPa and the traverse speed was higher than 600 mm/min, the water jet caused minimal damage to the coating. When the pressure was 5 MPa, the cleaning ratio was between 45 and 60%, and the level of cleaning increased with increasing pressure. Two proposed concepts of exposure ratio and nonexposed area were applied to quantitatively analyze the theoretical upper and lower limits for grease that could be cleaned from two typical structures. The results showed that the lower and upper cleaning limits for structure 7 × 3 were 38.1% and 83.3%, while the lower and upper limits for structure 1 × 3 + 5 × 7 were 35.5% and 59.2%, respectively. This result explains why the grease content of structure 7 × 3 was lower than that of structure 1 × 3 + 5 × 7 after cleaning. In addition, the adhesion test results showed that adhesion to the two kinds of steel wire ropes after cleaning was increased by 126% and 145.71%, respectively, which means that additional processes for improving adhesion could be omitted after using a water jet for cleaning. This is an advantage that traditional cleaning processes do not offer.
由于传统清洗工艺对环境构成危害，在不久的将来可能会被禁止。在本研究中，首次使用水射流清洗钢丝上的油脂残留。钢丝绳表面的能谱（EDS）和扫描电子显微镜（SEM）结果以及在镀锌钢板上进行的补充水射流冲击实验表明，当压力低于50兆帕且横向速度高于600毫米/分钟时，水射流对涂层造成的损伤最小。当压力为5兆帕时，清洗率在45%至60%之间，且清洗程度随压力增加而提高。应用提出的暴露率和未暴露面积两个概念，定量分析了两种典型结构可清洗油脂的理论上限和下限。结果表明，7×3结构的清洗下限和上限分别为38.1%和83.3%，而1×3 + 5×7结构的下限和上限分别为35.5%和59.2%。这一结果解释了为什么清洗后7×3结构的油脂含量低于1×3 + 5×7结构。此外，附着力测试结果表明，清洗后两种钢丝绳的附着力分别提高了126%和145.71%，这意味着使用水射流清洗后可以省略用于提高附着力的额外工艺。这是传统清洗工艺所没有的优势。
