A system for magnetically inspecting a metallic component having a surface, the system comprising: a holder (134; 234; 434) configured to hold the metallic component; a probe fixture configured to hold a magnetic probe (112; 212; 312; 412), the magnetic probe (112; 212; 312; 412) having a probe tip (114; 214; 314; 414) aligned with a probe axis, the magnetic probe (112; 212; 312; 412) configured to measure a magnetic permeability of the metallic component; a manipulator (130; 230; 430) configured to manipulate a relative position between the holder (134; 234; 434) and probe fixture; and a controller (150; 250) configured to: control the manipulator (130; 230; 430) to trace an inspection route upon the surface of the metallic component along which the probe tip (114; 214; 314; 414) contacts the metallic component such that an angular difference between the probe axis and a surface tangent plane of the metallic component is 90±10 degrees; receive the magnetic permeability of the metallic component measured by the magnetic probe (112; 212; 312; 412) along the inspection route; determine a magnetic anomaly map based on the magnetic permeability of the metallic component; determine a first corrosion element thickness (D X1) based on the magnetic anomaly map; the system being characterized in that the controller is further configured to determine a first remaining non-corrosion wall thickness (D Y1) based on a calculation using the first corrosion element thickness (D X1) and a three-dimensional model of the metallic component; and transmit the first remaining non-corrosion wall thickness (D Y1) via an input-output interface. a holder (134; 234; 434) configured to hold the metallic component; a probe fixture configured to hold a magnetic probe (112; 212; 312; 412), the magnetic probe (112; 212; 312; 412) having a probe tip (114; 214; 314; 414) aligned with a probe axis, the magnetic probe (112; 212; 312; 412) configured to measure a magnetic permeability of the metallic component; a manipulator (130; 230; 430) configured to manipulate a relative position between the holder (134; 234; 434) and probe fixture; and a controller (150; 250) configured to: control the manipulator (130; 230; 430) to trace an inspection route upon the surface of the metallic component along which the probe tip (114; 214; 314; 414) contacts the metallic component such that an angular difference between the probe axis and a surface tangent plane of the metallic component is 90±10 degrees; receive the magnetic permeability of the metallic component measured by the magnetic probe (112; 212; 312; 412) along the inspection route; determine a magnetic anomaly map based on the magnetic permeability of the metallic component; determine a first corrosion element thickness (D X1) based on the magnetic anomaly map; the system being characterized in that the controller is further configured to determine a first remaining non-corrosion wall thickness (D Y1) based on a calculation using the first corrosion element thickness (D X1) and a three-dimensional model of the metallic component; and transmit the first remaining non-corrosion wall thickness (D Y1) via an input-output interface. control the manipulator (130; 230; 430) to trace an inspection route upon the surface of the metallic component along which the probe tip (114; 214; 314; 414) contacts the metallic component such that an angular difference between the probe axis and a surface tangent plane of the metallic component is 90±10 degrees; receive the magnetic permeability of the metallic component measured by the magnetic probe (112; 212; 312; 412) along the inspection route; determine a magnetic anomaly map based on the magnetic permeability of the metallic component; determine a first corrosion element thickness (D X1) based on the magnetic anomaly map; the system being characterized in that the controller is further configured to determine a first remaining non-corrosion wall thickness (D Y1) based on a calculation using the first corrosion element thickness (D X1) and a three-dimensional model of the metallic component; and transmit the first remaining non-corrosion wall thickness (D Y1) via an input-output interface.