IT1118024B - Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint
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Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint
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Publication number
IT1118024B
IT1118024BIT2167077AIT2167077AIT1118024BIT 1118024 BIT1118024 BIT 1118024BIT 2167077 AIT2167077 AIT 2167077AIT 2167077 AIT2167077 AIT 2167077AIT 1118024 BIT1118024 BIT 1118024B
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Application filed by Metallgesellschaft Ag, Parker Ste ContinentalefiledCriticalMetallgesellschaft Ag
Priority to IT2167077ApriorityCriticalpatent/IT1118024B/en
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Publication of IT1118024BpublicationCriticalpatent/IT1118024B/en
The process comprises treating the surface of Al (alloy) with an alkaline soln. having pH >10 and contg. Ti ion and complexing agent, washing with water, and then treating with an acidic soln. contg. tannine or tannic acid as the main component. In an example Al alloy plate was spray with an alkaline soln. contg. NaOH of 7 g/l, 40% Ti sulphate soln of 1 g/l and Na gluconate of 1-8 g/l at 65/C for 6 sec. washed with water, spray with an acidic soln. contg. tannic acid of 50 g l at 55 degrees C ofr l sec. washed with water, and then dried.
IT2167077A1977-03-251977-03-25Forming protective coating on aluminium (alloy) - giving film resistant to corrosion, and with excellent adhesion to paint
IT1118024B
(en)
AQUEOUS ACID SOLUTION FOR FORMING A PASSIVATING CHROMATE FILM ON RECEPTIVE METAL SUBSTRATES AND ARTICLES WITH A RECEPTIVE METAL SURFACE TREATED WITH SUCH A SOLUTION.
Aqueous acid solutions of zinc sulphate for coatings of chemical conversion on surfaces of iron and zinc and concentrates for coating and solutions containing titanium for the activation of metals that can be used in such processes.