1, remove the surface of the solder slag, burrs, grease and dirt and other attachments. For the pipe stoush of polyethylene heat shrink sleeve anti-corrosion layer overhaul, the original anti-corrosion layer and residue should be removed by appropriate method.
2, the use of mechanical or blast blast blast ingress edified rust removal method, if specifically designated blast treatment.
3, after rust removal, the stain on the surface of polyethylene heat shrink should be treated, attached to the surface of the heat shrink sleeve dust, abrasives should be removed clean, steel pipe surface should be kept dry. When rerusting or surface contamination occurs, surface pretreatment needs to be re-treated.
The main work on surface pretreatment is to remove rust and paint primer, we have done a bit of surface pretreatment in these places, the next anti-corrosion work will achieve better results, but also can improve its efficiency.
Polyethylene heat shrink sleeve in the surface of the pretreatment work, we must pay attention to the details of the operation, some casual small details may be caused by product damage or reduced effect factors, so before construction, carefully read the relevant manuals and the interpretation of operational precautions, do a good job of preparing.