Ammonium-salt-free plating assistant agent used for hot dip galvanizing and technical methods for preparation and use thereof
A plating flux and hot-dip plating technology, which is applied in hot-dip plating process, metal material coating process, coating, etc., can solve problems such as easy occurrence of missing plating and unsatisfactory plating effect, and achieve reduction of pollution, Reduce the generation of smoke and dust and improve the effect of working environment
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Embodiment 1
[0017] Embodiment 1: get fluorocarbon surfactant such as potassium perfluorooctane sulfonate 1Kg, coconut oleic acid alkanolamide 20Kg, zinc chloride 800Kg, sodium chloride 300Kg, 10000L tap water are made into plating aid solution, fully stir , Heat the flux to 40°C. Immerse 480Kg of 75×75×6 angle steel with a length of 400mm after degreasing, pickling, derusting and rinsing into the fluxing solution. After the angle steel is taken out of the fluxing solution, it is dried on a drying bed at a temperature of 40°C for 22 minutes, and then the angle steel is immersed in zinc. When galvanized in the bath, only a small amount of smoke is generated on the surface of the zinc solution when immersed. After dipping for 1 minute, the angle steel is taken out of the zinc solution and cooled in a water bath. It is found that the surface of the angle steel has no missing plating phenomenon, and the coating color is uniform.
Embodiment 2
[0018] Embodiment 2: get fluorocarbon surfactant such as N-propyl perfluorooctyl sulfonyl quaternary ammonium iodide 20Kg, fatty acid alkanolamide 40Kg, zinc chloride 3500Kg, sodium chloride 1000Kg, 10000L tap water is made into plating flux Solution, stir well, and heat the fluxing solution to 70°C. Immerse 600Kg of 75×75×8 angle steel with a length of 400mm after degreasing, pickling, derusting and rinsing into the fluxing solution. After the angle steel is taken out of the fluxing solution, it is dried on a drying bed at a temperature of 140°C for 5 minutes, and then the angle steel is immersed in zinc When galvanized in the bath, only a small amount of smoke is generated on the surface of the zinc solution when immersed. After dipping for 1 minute, the angle steel is taken out of the zinc solution and cooled in a water bath. It is found that the surface of the angle steel has no missing plating phenomenon, and the coating color is uniform.
Embodiment 3
[0019] Embodiment 3: get fluorocarbon surfactant such as N-methyl perfluorooctyl sulfonylaminoethanol 12Kg, alkanolamide phosphoric acid ester 60Kg, zinc chloride 2400Kg, sodium chloride 1600Kg, 20000L tap water is made into plating flux solution , stir well, and heat the fluxing solution to 80°C. After degreasing, pickling, derusting and rinsing, 880Kg of 50×50×4 angle steel with a length of 360mm is immersed in the fluxing solution. After the angle steel is taken out of the fluxing solution, it is dried on a drying bed at a temperature of 110°C for 5 minutes, and then the angle steel is immersed in zinc. When galvanized in the bath, the amount of dust generated on the surface of the zinc solution is very small. After dipping for 1 minute, the angle steel is taken out of the zinc solution and cooled in a water bath. It is found that there is no missing plating phenomenon on the surface of the angle steel, and the coating color is uniform.
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