How to protect unbonded tendon and anchorage is the key to prevent corrosion in unbonded prestressed concrete.The cause of corrosion, mechanism of action and protection measures are herein analyzed.

• 无粘结筋与锚具是无粘结预应力结构防腐蚀的关键。分析了腐蚀产生的原因，作用的机理和防护措施。