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钢筋混凝土是最重要的建筑材料之一。钢筋混凝土的腐蚀破坏，直接影响到工程结构的可靠性和大型建筑长期的安全保障。因此，钢筋混凝土的腐蚀研究和防护技术的开发，已经成为国际上普遍重视的热点之一。首先总结、分析并阐述了在腐蚀环境条件下，混凝土中钢筋腐蚀发生和发展的原因，腐蚀性组分（主要是氯离子）从环境透过作为多相电解质的混凝土达到钢筋表面，破坏了钢筋的钝态，是钢筋腐蚀的主要原因。钢筋腐蚀产物的容胀应力，使混凝土裂开，加速了腐蚀组分由环境渗入到钢筋表面的传质过程，使腐蚀得以进一步扩展。而后，讨论了钢筋混凝土的腐蚀防护对策和安全检测／监测技术。在上述基础上，探讨了某些重要的常用技术和有待研究开发的新技术。
Reinforced concrete is one of the most important building materials. The corrosion damage of reinforced concrete directly affects the reliability of the engineering structure and the long-term safety guarantee of large buildings. Therefore, the research on the corrosion of reinforced concrete and the development of protection technology have become one of the hot spots in the international community. First, the reasons for the occurrence and development of corrosion of rebar in concrete under corrosive environmental conditions are summarized, analyzed and elaborated. The corrosive components (mainly chloride ions) pass from the environment through the concrete as a multiphase electrolyte to the surface of the rebar, destroying the rebars. The passive state is the main reason for corrosion of rebar. The swelling stress of the corrosion product of the steel bar cracks the concrete and accelerates the mass transfer process of the corrosion component from the environment into the surface of the steel bar, so that the corrosion can be further expanded. Then, corrosion protection measures and safety inspection/monitoring techniques for reinforced concrete were discussed. Based on the above, some important commonly used technologies and new technologies to be researched and developed are discussed.