根据GB/T 10125-2015及委托方给定技术条件,将牌号级别的Q690的三个规格14mm、20mm、28mm进行中性盐雾试验,每个规格5个试样,对比试样为Q235规格为16mm,试验时间72h。对比试样的腐蚀率为2.1-2.2g/m2h,三种规格的试样腐蚀率并没有很大差异。
According to GB / T 10125-2015 and the technical conditions given by the client, conduct neutral salt spray test on three specifications of 14mm, 20mm and 28mm of brand grade Q690. There are 5 samples of each specification, the comparison sample is Q235, the specification is 16mm, and the test time is 72h. The corrosion rate of the comparison sample is 2.1-2.2g/m2h, and there is no significant difference among the three specifications.