Prevenção de corrosão

501-25-34 Body Repairs - General Information 501-25-34 DESCRIPTION AND OPERATION Reworking of the affected areas is therefore vital: ‡ Grind the welded seams flat and clean thoroughly with silicone remover. Dry with a lint-free cloth. ‡ If the join area is accessible from the inside, the transition area to the paint must be abraded for all types of join so that good adhesion of the primer is achieved later. ‡ If the join area is not accessible from the inside, the cleaning and sanding work is not done. For this reason, ensure that there is as little contamination as possible in the area of the repair. This allows the cavity wax applied later to penetrate the join area without hindrance. NOTE: Only apply a small amount of panel cleaner to the cleaning cloth when cleaning the repair area. Make sure that no cleaner reaches the connecting flange, so that the welding primer is not washed away again. Priming after welding Primer is applied to the welded flanges after cleaning. A check must also be made that the production corrosion protection is present in the area of the flanges. Any damage must also be re-primed. Sealing work ‡ If MIG welding is carried out during a sectional repair on a connecting flange with sealant or adhesive material, the material must be applied at a distance of approx. 10 mm from the weld spot. ‡ These areas must be sealed very carefully after the work has been completed. Depending on the type of repair, the clinched flanges on the hood, doors, tailgate and trunk lid must be sealed with clinched flange sealer. Clinched flange protection with flat nozzle E50959 Clean the clinched flange area of the new component with silicone remover and dry with a lint-free cloth. The sealant must be applied to the dry primed surface (i.e. dip priming as for delivery). Apply clinched flange protection to the clinched flange using one of the flat nozzles supplied. The nozzle must be cut to the necessary width beforehand and the guide stop cut as required. During application the clinched edge must be covered with an overlap of at least 3 mm. The beginnings, ends and edges or interruptions in the sealer bead need to be reworked by forming with a brush or a spatula, to ensure a 100% tight sealing of the flange. The speed and angle of application are decisive for a good appearance and a bubble-free bead. Always apply the sealer with as few as possible interruptions to avoid sealer rework. Never use solvents or thinners as this will considerably slow down the hardening process of the sealer. For an application thickness of 3 mm of the clinched flange sealer it is recommended to allow to dry over night at room temperature. A minimum hardening time of 5 hours is required anyhow before a 2-component primer can be applied. Clinched flange protection applied to the correct width and thickness. 3 mm 10 mm 2 mm E50972 Underbody protection/stone chip protection The underbody protection is used as corrosion protection and must also be applied such that it matches the original condition, from a visual perspective. Two main application methods are used in production: