CAJ | 학술논문

钢结构棱角在防腐涂装过程中存在应力集中现象,显著降低了涂层结合力,导致整个防护体系从边角处被腐蚀介质快速突破,从而大大缩减腐蚀防护体系的保护寿命.本试验设计了3种打磨棱角的圆角半径,进行了电弧喷铝涂层的附着力测试.研究结果表明,钢结构棱角打磨成R1.5 mm圆角后,即可保证热喷铝涂层的附着力达到国标要求;施工时采用R2.0 mm圆角,可彻底解决边角涂层的结合力问题.
강결구릉각재방부도장과정중존재응력집중현상,현저강저료도층결합력,도치정개방호체계종변각처피부식개질쾌속돌파,종이대대축감부식방호체계적보호수명.본시험설계료3충타마릉각적원각반경,진행료전호분려도층적부착력측시.연구결과표명,강결구릉각타마성R1.5 mm원각후,즉가보증열분려도층적부착력체도국표요구;시공시채용R2.0 mm원각,가철저해결변각도층적결합력문제.
A stress concentration phenomenon exists in steel structure edges and comers during corrosion protection coating and the adhesion is remarkably reduced as a result, the whole protection system is rapidly broken down by corrosive medium starting from the edges and comers, leading to reduced service life of the protective system. In this article, a adhesion test for electric arc sprayed aluminum coating on edges and comers with three kinds of round angle radii was studied. The experimental results indicated that the adhesion of the thermal sprayed aluminum coating was up to the demand of national standard when the round angle radius of the steel structure edges and comers is 1.5 mm after being burnished, and the adhesion problem existing in the coating on edges and comers was thoroughly solved when a round angle radius of 2.0 mm is used during construction.