The steel structure of 40*80 steel, it is tempered glass top. The steel internal fight foaming agent. But there is rust in the inner surface. Will it affect the safety? How to deal with
This shows that the coating has entered the water or corrosive medium, and should not have much to do with the wall of the square pipe. Reasons for coating failure:1, the grass-roots treatment is not good. Steel structure shall be sand blasted.2, the selected paint should be better performance of anti-corrosion coatings, rather than ordinary alcohols and acids.3, must have primer, finish matching.4, coating thickness must be more than 200 microns in order to effectively prevent water penetration. The paint sprayed from you is likely to be caused by too much coating. Unless you spray it with airless spraying.
Generally it is installed, both ends of the welding pipe will be closed, if the internal tube can be in a closed state, the inner wall surface after a certain period of time, will form a passivation layer, no further corrosion, so long as the section strength enough, in the period of use should be safe.
The rust removal on the inner wall of pipe profiles has always been a thorny problem. If the corrosion is not serious, the treatment is usually not done. If you want to anti-corrosion effect is good, but also to go inside the paint corrosion prevention practices, very few.
