Durability of Multiple-Anticorrosive Bolts in a Corrosive Environment

Abstract This paper first introduces the structure of multiple-anticorrosive bolts and the anticorrosive mechanism. To thoroughly analyze the durability of multiple-anticorrosive bolts in a corrosive environment, different corrosive environments were simulated and experiments on the durability of double- and multiple-anticorrosive bolts were conducted. Apparent changes were observed and the bond strength after corrosion was measured. From these test data, the resistance to corrosion was compared for the two types of bolts, and formulae for the service life of double- and multiple-anticorrosive bolts were derived in different corrosive environments. At the same time, a number of modification coefficients for optimization of the service-life formulae were put forward. The anticorrosion performance of the multiple-anticorrosive bolt was mainly studied and compared with that of the double-anticorrosion bolt, and the multiple-anticorrosive bolt was verified to have superior durability in a corrosive environment. The conclusions drawn in this study can be applied in the design of anticorrosive bolts to be used in an underground structure and later applied in durability analysis, providing reference values for actual engineering.