Landscape Stone are increasingly used in cities, but there are many common damages on the surface of Landscape Stone. Let`s introduce them below.
Rust spots: Rust is sometimes seen on
stone carving products or equipment before or during the production process, which indicates that the surface is seriously contaminated. Rust must be removed before equipment is put into service, and thoroughly cleaned surfaces should be inspected by an iron test and/or a water test.
Flux: Welding processes using flux include manual welding, flux cored arc welding and submerged arc welding. These welding processes will leave small flux particles on the surface, which cannot be removed by ordinary cleaning methods. These particles will be the source of crevice corrosion, and mechanical cleaning methods must be used to remove these residual fluxes.
Welding arc marks: When the welder strikes the arc on the metal surface, it will cause surface roughness defects. The protective film is damaged, leaving a potential source of corrosion. The welder should strike the arc on the already welded bead or on the side of the weld joint. The pilot arc trace is then melted into the weld.
Welding defects: Welding defects such as undercuts, incomplete welding, dense pores and cracks not only reduce the strength of the joint, but also become sources of crevice corrosion. When cleaning operations are performed to improve this outcome, they can also entrain solid particles. These defects can be repaired by re-welding or grinding and re-welding.
Thermal temper color and other oxide layers: Thermal temper color is caused by exposure to high temperatures or prolonged exposure to higher temperatures. When any of these oxide layers appear, the chromium content of the metal surface is reduced, causing these areas to be less corrosion-resistant. In this case, not only should the thermal temper color and other oxide layers be eliminated, but the chromium-poor metal layer beneath them should also be cleaned.
