Study on the corrosion behavior and mechanical response of weakly cemented sandstone in alkaline solutions.

The evolution of pores is increasingly away from elongated forms, progressing towards elliptical and even circular shapes.(3) The study found that the pH of the alkaline solution exhibits a decreasing trend over time due to the consumption of alkaline components in the solution.

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This change indicates that the reaction between the alkaline solution and minerals leads to the consumption of hydroxide ions, and this reaction stabilizes over time.(4) After hydrochemical corrosion, the uniaxial compressive strength of weakly cemented sandstone specimens decreases with increasing pH of the alkaline solution, while the modulus of elasticity shows an increasing trend with increasing pH.

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