Abstract: “Aluminium—plastic composite panel for curtain wall”（GB/T 17748—2016） was the main testing standard for aluminum—plastic composite panel for curtain wall. This paper mainly studied the test method of coating wear resistance in the standard. It was found that the standard lacks the instrument calibration procedure，which could not guarantee where the abrasion area would be formed after the sand beam flows out of the catheter. It was suggested that the standard should refer to ASTM D968—2015 and YS/T 1186—2017 to supplement the instrument calibration procedure in the next revision process. The determination of the wear end point was based on the instrument calibration. If the instrument calibration was not carried out，the wear end point obtained was easily a crescent area rather than the circular area described in the standard. The standard did not give the number of timesthe sand was used. It was recommended to replace the sand by referring to the 25 times of usein ASTM D968—2015 to ensure the best wear effect of the sand. The standard should not onlygive the specified value of sand particle size，but also give the specified value of sand densityto ensure consistent flow rate. It was also necessary to fix the amount of sand added into thefunnel each time. It was recommended to refer to the foreign standard 2-3 L to ensure theaccuracy of detection. It was very difficult for the test results to meet the wear resistance ≥5 L/μm specified in the standard，and the direct calculation results were greatly affected by instruments and abrasives，and the repeatability and reproducibility were low. Itwas recommended to use sequencing method to determine.

Key words: GB/T 17748—2016；abrasion resistance；instrument calibration；sand beam , velocity；sort

摘要： 通过研究 GB/T 17748—2016《建筑幕墙用铝塑复合板》中涂层耐磨耗性实验方法，发现标准中缺少仪器校准步骤，无法保证砂束流出导管后的磨损区域，建议修订标准时参考 ASTM D968— 2015和 YS/T 1186—2017补充仪器校准程序；磨损终点的确定是以仪器校准为前提，否则得到的磨损终点很容易是一个月牙形而不是标准中所描述的圆形；标准中未给出砂子使用次数，建议参考 ASTM D968—2015中的 25次，以保证砂子的最佳磨损效果；标准中规定砂子粒径的同时，还需规定砂子密度，确保流速一致；每次加入漏斗中的砂量，建议参考国外标准定为 2~3 L；检测结果要达到标准规定的耐磨耗性 ≥5 L/μm难度很大，并且直接计算结果受仪器、磨料影响较大，重复性和复现性较低，建议采用排序判定方式。

关键词:  , GB/T 17748—2016；耐磨耗性；仪器校准；磨损终点；砂束流速；排序

CLC Number: 

• TQ630. 7+ 2