Abstract: The annual economic losses caused by atmospheric corrosion of every year are enermous. Exploring the factors
and degradation laws of atmospheric corrosion of metal structures is of great significance for predicting the service life of metal
structures and strengthening support. As the mining depth increases,the corrosion durability problem of underground engineering
support structures becomes increasingly prominent. It is imperative to conduct research on the degradation law of support
structures in deep mine environments. To this end,the current research progress on metal atmospheric corrosion was summarized,
and the degradation laws of six environmental factors on metal structures were analyzed from the main influencing factors
and their mechanisms. Based on the comparison of the advantages and disadvantages of on-site exposure tests and indoor acceleration
tests and their correlation indicators,the current research and development status of indoor acceleration test devices was
further summarized. Based on the above research,it is shown that:① The relative humidity of the environment provides the environmental
basis for the occurrence of atmospheric corrosion,temperature affects the speed of atmospheric corrosion,and the
influence of other environmental factors on corrosion rate is closely related to their content. Multiple factors are interrelated and
work together,resulting in a complex mechanism of atmospheric corrosion. ② The on-site exposure test is authentic and reliable,
but it has disadvantages such as regional limitations,poor real-time performance,and long testing cycles. Therefore,correlation
indicators can be established through corrosion products,corrosion kinetics,and indoor testing. ③ The indoor acceleration
test device can simulate some atmospheric corrosion environments,but there is no full-scale support structure multi factor coupled
indoor acceleration test device developed specifically for deep mine environments,making it difficult to accurately explore
the degradation laws of support structures in deep mine environments. Based on the analysis of the above environmental factors
and the current status of device development,it is concluded that the current atmospheric corrosion has shortcomings such as
single research on environmental factors and the lack of accelerated corrosion test devices for simulating deep mine environments.
Therefore,a research and development concept for an indoor accelerated corrosion test device is proposed to explore the
failure law of anchor rod anchoring structures in harsh mine environments. Based on the correlation of mine environmental impact
factors and test acceleration,simulations of five environments including temperature environment,humidity environment,
solid particle environment,multiple corrosive gas environment,and mixed bacterial system have been achieved,and three simulation
working conditions including full-size support elements,surrounding rock simulation units,and pre stress application have
been set up. On the basis of the above analysis,the shortcomings in the research field of atmospheric corrosion of metal structures
were further discussed,such as the single corrosion factor,failure to consider the influence of mixed bacterial systems and
the influence of low and medium energy disturbance stresses on support structures,and the small size of corrosion specimens.
It is believed that future research should focus on:① Exploring the coupling effect of complex environmental factors on support
systems based on the degree of degradation of environmental factors;② Clarify the corrosion and degradation laws of mixed
bacterial systems on support structures under environmental induction;③ Revealing the corrosion degradation mechanism of
support structures under disturbance stress at low and medium energy levels;④ Strengthen the research on full-size support
structures to avoid errors caused by sample size effects.