NIGRIT GEL “Al Liquid Black 4.20“
Black pickling and cold burnishing agent
• Viscous medium (gel) on acid basis
• Especially for freshly sanded aluminium
(also for individual freshly sanded areas on aluminium surfaces)
Pictures may differ from the original.
Packaging units:
| Application area: | COLD BURNISHING - BLACKENING of freshly sanded aluminium |
| Application: | The ready-to-use gel has been developed for precise direct dosing. |
| Degreasing and inserting the parts: | Thorough degreasing of the parts is a prerequisite for uniform blackening. |
| Blackening effect: | Depending on the material, blackening occurs relatively quickly (approx. 5 - 30 sec. after application). Longer exposure times are possible, but should be determined by preliminary tests so that the workpiece to be treated is not damaged. Afterwards the spots or parts are cleaned with sufficient water and rubbed well dry with a clean cloth (rag). |
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After removal of the loose oxides, which should be done expediently in a neutralisation bath with the product NEUTRASOL Concentrate (EO Cat. No. 0875), the workpiece should be dried and preserved.
Neutralization bath:
Normal tap water with our NEUTRASOL can be used to prepare the bath. The pH value must be checked constantly and should not fall below pH-10, otherwise the workpieces may start to corrode.
Preservation:
EO post-treatment fluid (EO Cat. No.: 0871) is a temporarily effective, preserving metal protection for application after use of NIGRIT GEL “Al Liquid Black 4.20”. Corrosion phenomena are always undesirable, therefore the metal surface should be treated briefly with this fluid after each application (recommendation: “thin application”). The water-displacing additives reliably prevent contact between the metal surface and remaining moisture.
Questions about our products?
We will advise you by phone 06123 / 7046-0.
