作为低合金耐候钢研究的一部分,已对广泛的合金元素影响进行了试验.天然暴露试验的缺点是需要较长的时间才能获得可靠的结果,而且也很难分离和测定某一大气因素如二氧化硫或温度的影响.由于这两个原因,决定研制一种实验室试验装置,以便比大气暴露更快地提供可靠的结果,并测定某些大气因素的特殊影响. As part of a study of low alloy weathering steels, a wide range of alloying element effects have been tested.The disadvantage of natural exposure testing is that it takes longer to obtain reliable results and it is also very difficult to isolate and determine atmospheric factors such as sulfur dioxide Or temperature.For both reasons, it was decided to develop a laboratory test set-up to provide reliable results faster than atmospheric exposure and to determine the specific effects of certain atmospheric factors.