Corrosion　can　significantly　impact　the　safety　and　stability　of　the　entire　structure　by　reducing　the　service　life　and　load-bearing　capacity　of　anchors.　This　study　provides　an　in-depth　examination　of　the　effects　of　corrosion　on　prestressed　anchor　cables,　covering　the　effects　on　the　anchor　cables　themselves　and　the　bond　interface.　The　force　characteristics　and　load　transfer　mechanisms　within　the　anchorage　structure　were　explored　through　a　detailed　analysis　of　the　three　key　components:　the　anchor　cable,　the　grout,　and　the　surrounding　rock.　The　distribution　functions　of　axial　force　and　interfacial　shear　stress　considering　the　debonding　of　the　anchor-grout　interface　were　derived,　and　the　prestressed　corrosion　damage　model　was　further　developed.　Taking　the　anchoring　project　on　the　slopes　in　Nagasaki　as　an　example,　the　stress　distribution　of　anchor　cables　under　different　surrounding　rock　conditions　was　analyzed　in　depth.　The　results　showed　that　the　relative　deformation　of　the　grout　and　the　surrounding　rock　decreases　when　the　elasticity　modulus　of　the　surrounding　rock　increases,　resulting　in　a　reduced　axial　force　in　anchor　cables　and　an　increased　interface　shear　stress.　Thresholds　exist　for　the　effect　of　the　total　anchor　length　and　radius　on　prestressing　stability.　When　designing　anchor　structures　in　corrosive　environments,　there　is　no　need　to　choose　excessive　anchor　length　or　anchor　radius　to　achieve　better　cost-effectiveness.　In　practical　underground　engineering,　the　force　in　anchor　cables　is　transferred　to　the　surrounding　rock　through　the　anchoring　section,　where　the　length　of　the　anchorage　section　has　a　more　direct　impact　on　prestress　transfer　and　stability.　©　2025　Chinese　Society　for　Rock　Mechanics　&　Engineering.