尿液侵蚀处理对棉布尿不湿吸湿性能影响

通过对尿液侵蚀处理后的棉纤维、棉纱及纯棉织物的吸湿回潮性能测试,探讨了尿液侵蚀处理对棉布尿不湿吸湿性能影响。结果表明,尿液的温度越高,对纯棉织物吸湿回潮性能下降越大,而纯棉织物织造所用的纱线越细,捻系数越小,织物组织结构浮长线越长,尿液侵蚀对纯棉织物的吸湿回潮性能下降越小。同时,棉纤维、棉纱与纯棉织物的吸湿回潮性能均随着尿液侵蚀处理时间的增加而不断下降,且下降幅度变化最大的时间区间均在0~5h。

Evaluation and classification of seawater corrosiveness by environmental factors

According to the data of main environmental factors and the depth of localized corrosion of carbon steel and low alloy steels in China seas, combined with the result of grey interrelation analysis, double-factor method was proposed to evaluate and classify seawater corrosiveness. According to the temperature of seawater and the biologically adhesive area on steels, the corrosiveness of seawater from low to high level is classified into five levels （C l-C5）, which was identified by the data of corrosion depth of carbon steel immersed in water for one year.