On the corrosion protection of anchor bolts
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For large tower equipment located in corrosive environments (where there may be leaks of acidic substances, etc.), what measures are taken to protect the anchor bolts from corrosion? Including the parts above and below the ground surface. I found some information to discuss with everyone; there’s the truth behind the texture on floor 10
The anti-corrosion measure for anchor bolts is simply painting them.
Well, yes, this is the standard practice
There is also the option of painting, but this method is not recommended as it has a significant impact on the subsequent removal and maintenance of bolts; the paint may prevent the bolts from being removed, forcing one to use gas cutting in the end
Give some encouragement and see what trick the original poster will use
It’s not about using any special techniques; it was proposed on-site for the project, and it mainly relates to the corrosion protection of bolts both above and below the ground surface.
The current company directly injects it into the base; they haven’t paid attention to corrosion prevention though
It is indeed buried directly in the ground; maybe there’s something wrong with my description. Never mind, I can’t wait until the 10th floor; given the situation, it’s unclear when we’ll get there, haha. Regarding the issue of anchor bolts, the HG/T21545-2006 standard \"General Drawings for Anchor Bolts\" provides relevant descriptions; see the diagram. As for the anti-corrosion treatment of the part of the bolt that is above the surface, this involves applying grease. This is done both for anti-corrosion purposes and, to a large extent, to facilitate the removal of the bolts. The sleeve serves to prevent the grease from escaping when temperatures are high. Of course, some manufacturers also use paint, or new types of tetrafluoro powder coatings, among other methods. The common practice is still to use butter. As for the corrosion protection of the part below the ground surface (i.e., the part buried underground), it is actually dependent on the inherent corrosion-resistant properties of the materials used, including those of the anchor bolts, as well as on the use of cushion layers to protect the underground portion. See figure:
After much waiting, it finally appears; it seems that what’s important is to apply grease and cover it with a sleeve
For the corrosion protection of fasteners, the first approach relies on the inherent corrosion resistance of the material itself (such as stainless steel series), while the second approach depends on surface treatment methods (electro-galvanizing, hot-dip galvanizing, zinc infiltration, nickel plating, Dacromet coating, lining – for carbon steel and alloy steel), Teflon, etc. Additional measures such as painting, applying grease, or using sleeves are also used (these rely on external materials to prevent corrosion)