本实验着重研究Na0H溶液在去除2014铝合金试样表面Al_2O_3过程中,对试样晶间腐蚀的影响。NaOH溶液既能与Al_2O_3反应,也可以与铝反应,当用NaOH溶液清洗试样时间过长时,试样表面的铝过多的与NaOH溶液反应,使试样表面凹凸不平,造成损伤,表面缺陷增多,从而加重试样晶间腐蚀程度。故在研究2014铝合金晶间腐蚀试验中应减少NaOH溶液清洗的时间。 This experiment focuses on the Na0H solution in the removal of 2014 aluminum alloy sample surface Al 2 O 3 during the sample intergranular corrosion. NaOH solution can not only react with Al 2 O 3 but also react with aluminum. When the sample is washed with NaOH solution for too long time, too much aluminum in the sample surface reacts with NaOH solution to make the sample surface uneven and cause damage. The surface Defects increase, thereby increasing the degree of intergranular corrosion of the sample. Therefore, in the study 2014 aluminum alloy intergranular corrosion test should reduce the NaOH solution cleaning time.