The anti-corrosion treatment for the outer wall of the storage tank employs a low-surface-treatment method; can the service life of the coating exceed 10 years?
Thread Content
The image below shows a storage tank whose exterior walls require anti-corrosion coating. May I ask that without using metal sandblasting or manual mechanical rust removal, it is not necessary to achieve the Sa2.5 or St3 standards? What type of anti-corrosion material should be used so that a single coating application can last for over 10 years?
Happy New Year! ! ! ! ============================== The exterior of this storage tank is completely rusted, though it’s not yet severe rust; rust removal is necessary. It’s not effective to achieve corrosion protection by applying paint without first removing the rust. The oxidized iron resulting from rusting absorbs water, and the paint does not bond properly with the underlying surface, making it easy for the paint to peel off
For such a large scale of anti-corrosion work, it is still recommended to use sandblasting for rust removal as the most suitable method. Ladder trucks are now very common, and sandblasting machines have become smaller, so on-site construction should not be a problem. It is likely impossible to avoid physical rust removal. As for a paint lifespan of ten years, it is difficult to achieve; factors such as light exposure, acid rain, and changes in atmospheric temperature make it hard to reach such a long period of time. The relatively good and commonly used paint these days is \"epoxy zinc-rich paint\"; it has to be the genuine product. If a \"copy\" is used, repainting it once a year would already be considered good enough. For reference.
Before assembling such storage tanks, each steel plate should be derusted and coated with anti-corrosion paint; no coating is applied within 150 mm of the welds, which helps to reduce the amount of work required later on.
This post was last edited by longziyun on 2021-1-4 at 11:22. Since the original poster is a master of anti-corrosion, I wonder if this is meant as a test for everyone here? The flame intensity is too high; it seems a bit overbearing. Even a complete layperson like me feels that this problem has no solution. :L
Sandblasting + polyaniline + fluorocarbon is feasible
Can we try a different approach? Paint the panel in advance, leaving the weld area untouched for additional painting
Agree with the view on the 4th floor; that’s how our company carries out construction
Rust-resistant paint with rust-inhibiting properties can be tried; personally, I think it’s best to remove the rust first.
Rust-resistant paint with rust-inhibiting properties can be tried; personally, I think it’s best to remove the rust first.