When we learn about the application of anchor bolts, we have to know everything about the life of anchor bolts, that is, how do anchor bolts prevent corrosion in time, weather, and environmental zones?
1. Medium factors: Although some anchor bolts do not directly contact the medium, for various reasons, corrosive medium is likely to be transferred to the anchor bolts, which will cause the anchor bolts to corrode.
2. Environmental factors: For example, in a humid environment, carbon steel bolts will be corroded.
3. Factors of bolt material: In the design, although the anchor bolts are selected according to the regulations, they often only consider the strength of the bolts and do not consider that the anchor bolts will be corroded during use under special conditions. Corrosive materials, such as stainless steel, etc. is to multiply its cross-sectional area (which should be the effective area of the thread at this time) by the yield strength of the steel (Q235 yield strength is 235MPa). Since the design value is biased towards safety, the allowable stress during design is less than the yield strength.