Submerged friction stir welding (FSW) is used to improve the weld zones mechanical properties in the present study. This research aims to obtain the optimized process parameters used to fabricate the AA6063 Submerged FSW joint. In the Submerged FSW process, the most important influential factors are tool rotational speed, traverse speed, and pin profile in a seawater environment. The different workpieces are friction stir welded while submerged in seawater at different tool rotational speeds, traverse speeds, and tool pin profiles such as square pin, cylindrical taper pin, and threaded pin. The produced weldments were tested for the mechanical properties of higher tensile strength, microhardness, corrosion rate, and the microstructure of weldments was characterized by using a scanning electron microscope, transmission electron microscope, and X-ray diffractometer. The corrosion rate is investigated by using an electrochemical analyzer by potential dynamic polarization open-circuit technique. For this investigation, The Taguchi method with the L₉ orthogonal array design of experimentation is adopted. The maximum UTS was acquired in the weld joint fabricated with 1250 r/min of tool rotational speed, 45 mm/min traverse speed, and a square tool pin. The stirred zone is tested for microhardness. High hardness is achieved with high tool rotational speed and low traverse speed with a square tool pin profile. The corrosion rate is also decreased with high tool rotational speed, low traverse speed, and a square tool pin profile.

在本研究中，浸入式搅拌摩擦焊 (FSW) 用于改善焊缝区的机械性能。本研究旨在获得用于制造 AA6063 浸入式 FSW 接头的优化工艺参数。在淹没式 FSW 过程中，最重要的影响因素是海水环境中的工具旋转速度、横移速度和销钉轮廓。不同的工件在浸入海水中以不同的工具转速、横向速度和工具销轮廓（例如方销、圆柱锥形销和螺纹销）进行摩擦搅拌焊接。对生产的焊件进行了较高的抗拉强度、显微硬度、腐蚀速率等力学性能测试，并通过扫描电镜、透射电镜、和 X 射线衍射仪。通过电位动态极化开路技术使用电化学分析仪研究腐蚀速率。对于这项调查，田口方法与 L₉实验采用正交阵列设计。最大 UTS 是在以 1250 r/min 工具转速、45 mm/min 横向速度和方形工具销制造的焊接接头中获得的。测试搅拌区的显微硬度。高硬度是通过高刀具旋转速度和低移动速度与方形刀具销轮廓实现的。高工具转速、低移动速度和方形工具销轮廓也会降低腐蚀速率。