Dezincification layer is formed on brass during corrosion or stress corrosion cracking (SCC) in ammonia solution, and an additivestress is induced in the same time.
黄铜表面在氨水中腐蚀或应力腐蚀时形成脱锌层，由此产生一个附加拉应力。
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Meanwhile, through the grey forecasting of equidistant data sequent, GM(1,1) modeling is established, while the data analysis about the relationship between additivestress and time is made.
Aiming at finding a new cement additive to reduce the disadvantageous effect of the organic matters on cemented-soil compressive stress, the series of tentative experiments are carried out.