Wear corrosion is a significant problem impacting the lifetime of steel pipes used in hydraulic fracturing operations. To improve the lifetime of these steel pipes, the present work examines the effect and optimization of three propriety corrosion inhibitors (Dynarate, DWP, and CalGuard), as well as their concentration, on the tribocorrosion behavior of AISI 4715 steels used to carry fracking liquid from their storage pool to the geological formation. The wear and corrosion behavior of AISI 4715 steel was investigated using a reciprocating tribometer integrated with a three-probe electrochemical apparatus. Response surface methodology (RSM) was applied to statistically model the effects of various concentrations of Dynarate, DWP, and CalGuard, along with their combinations, on the average coefficient of friction (COF), as well as the total wear loss of the steel and optimize them. The overall results revealed that Dynarate significantly decreased the COF (0.147) and wear rate (0.3 mm/year) with an inhibition efficiency of 480% at a concentration of 1%. To investigate the effectiveness of the regression model at predicting the wear rate, the samples were characterized using 3D optical profilometer and scanning probe microscopy to describe the effect of various additive on the surface morphology of steel. The surface topography measurements indicated the worn regions for the samples where the Dynarate additive was used were smoother compared with those having the DWP and CalGuard additives.

磨损腐蚀是影响用于水力压裂作业的钢管寿命的重要问题。为了延长这些钢管的使用寿命，本工作研究了三种适当的缓蚀剂（Dynarate，DWP和CalGuard）及其浓度对用于承载压裂液的AISI 4715钢的摩擦腐蚀行为的影响和优化。从他们的储水池到地质构造。使用带有三探针电化学装置的往复式摩擦计研究了AISI 4715钢的磨损和腐蚀行为。应用响应面方法（RSM）对不同浓度的Dynarate，DWP和CalGuard及其组合对平均摩擦系数（COF）的影响进行统计建模，以及钢的总磨损损失并对其进行优化。总体结果显示，Dynarate显着降低了COF（0.147）和磨损率（0.3 mm /年），在1％的浓度下抑制率为480％。为了研究回归模型在预测磨损率方面的有效性，使用3D光学轮廓仪和扫描探针显微镜对样品进行了表征，以描述各种添加剂对钢表面形态的影响。表面形貌测量表明，与使用DWP和CalGuard添加剂的样品相比，使用Dynarate添加剂的样品的磨损区域更光滑。浓度为1％时，抑制效率为480％（3毫米/年）。为了研究回归模型在预测磨损率方面的有效性，使用3D光学轮廓仪和扫描探针显微镜对样品进行了表征，以描述各种添加剂对钢表面形态的影响。表面形貌测量表明，与使用DWP和CalGuard添加剂的样品相比，使用Dynarate添加剂的样品的磨损区域更光滑。浓度为1％时，抑制效率为480％（3毫米/年）。为了研究回归模型在预测磨损率方面的有效性，使用3D光学轮廓仪和扫描探针显微镜对样品进行了表征，以描述各种添加剂对钢表面形态的影响。表面形貌测量表明，与使用DWP和CalGuard添加剂的样品相比，使用Dynarate添加剂的样品的磨损区域更光滑。