Chemical corrosion of rock masses commonly exists in natural environment (e.g., rock masses immersed in acidic groundwater) and in rock engineering practice (e.g., acid fluid injection in unconventional reservoirs). Rock fractures as the primary paths for fluid flow are susceptible to the chemical treatment, which may lead to geologic hazards (e.g., induced landslides and earthquakes). Here we show the transitional behaviors of rock fractures between stick-slip and stable sliding due to the chemical corrosion, which is characterized by a sequence of fast rupture followed by one or more slow ruptures. The chemical corrosion also modifies the frictional properties of rock fractures, in terms of friction rate parameters, characteristic weakening distance, stiffness ratio, and frictional property ratio. Our results indicate that the chemical corrosion essentially reduces the critical stiffness of the fracture and makes it approach the stiffness of the loading system, resulting in the occurrence of slip transition. The slip transition is strongly influenced by treatment duration and shear process, and the real area of contact density is a physical control linking fracture surface topography and frictional responses, such as AE energy and shear stress drop. The understanding of slip transition can improve our ability to interpret the seismic data and to predict the slip behaviors.

岩体的化学腐蚀通常存在于自然环境中（例如浸没在酸性地下水中的岩体）和岩石工程实践中（例如非常规储层中的酸性流体注入）。作为流体流动的主要路径的岩石裂缝很容易受到化学处理的影响，这可能导致地质灾害（例如，诱发的滑坡和地震）。在这里，我们展示了由于化学腐蚀导致岩石裂缝在粘滑和稳定滑动之间的过渡行为，其特征是一系列快速破裂，然后是一个或多个慢破裂。化学腐蚀还改变了岩石裂缝的摩擦特性，包括摩擦速率参数、特征弱化距离、刚度比和摩擦特性比。我们的研究结果表明，化学腐蚀本质上降低了裂缝的临界刚度，使其接近加载系统的刚度，导致滑移转变的发生。滑移转变受处理时间和剪切过程的强烈影响，接触密度的实际面积是连接断裂表面形貌和摩擦响应的物理控制，例如 AE 能量和剪切应力下降。对滑动过渡的理解可以提高我们解释地震数据和预测滑动行为的能力。接触密度的实际面积是连接断裂表面形貌和摩擦响应的物理控制，例如 AE 能量和剪切应力下降。对滑动过渡的理解可以提高我们解释地震数据和预测滑动行为的能力。接触密度的实际面积是连接断裂表面形貌和摩擦响应的物理控制，例如 AE 能量和剪切应力下降。对滑动过渡的理解可以提高我们解释地震数据和预测滑动行为的能力。