| Title of Invention | A METHOD OF HOT DIP ALUMINIUM COATING ON STEEL PIPES/SECTIONS SURFACES |
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| Abstract | A method of hot dip aluminium coating on steel section comprising the steps of: a. checking the pipes for dimensions and chemistry, based on the suppliers test certificate, b. degreasing the said pipes using Sodium Hydroxide and Potassium per magnate solution heated between 70 to 85 Deg. C, c. Water washing the said degreased pipes twice at room temperature, d. pickling the water washed pipes using a light HCI Solution, e. water washing the said pickled pipes twice. f. flux cleaning the said washed pipes at 70 to 80 deg. C using a solution of KCL, NaCI, and ZnCI2, g. dipping the thus obtained pipes in hot flux contained in a bath having the temperature 740 to 770 Deg C for 6 to 10 minutes, the said Flux being made of KCL, Na3AIF6,NaCI, and ZnCI2, h. transferring the pipes from step g within 6 to 7 minutes to molten aluminium - silicon bath. The said bath containing 9 to 10% siliconand being maintained at 760 to 790 Deg C and keeping the e pipes in this bath for 6 to 8 minutes and removing the same after wiping the excess aluminium using air wipers. i. cooling the pipes of step h and keeping ready for the diffusion process as enumerated further. j. carrying out the process of Chromate passivation if required k. finally inspecting the pipes individually and checking for their coating and defects if any. l. after acceptance bundling and packing the said pipes. |
| Full Text | FORM 2 THE PATENTS ACT, 1970 (39 of 1970) PROVISIONAL SPECIFICATION ( Section 10) A METHOD OF HOT DIP ALUMINIUM COATING ON STEEL SECTIONS AND THERE OF THE PRODUCT SUNIL SHANTISARUP GUPTA FLAT NO-l,3rd FLOOR,MITRA KUNJ 16, PEDDER ROAD, MUMBAI-400026 MAHARASTRA, INDIA INDIAN THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE NATURE OF THE INVENTION This invention relates to a method of hot dip aluminum coating on steel sections and there of the product like steel pipes The steps for this process are: 1.Inspection The pipes are indented as per specification of the buyer. Supplier's Test certificate is taken on record. The pipes are dimensionally checked. Visual inspection of a sample of pipes is done for any faults 2.Surface Preparation. The pipes are degreased in a degreasing solution heated upto 80 Deg. C. This followed by water wash. They further go into acid pickling using a mild HC1. After pickling the pipes are water rinsed twice to remove all traces of acid. Then pipes are transferred to a hot flux bath. The temperature of this bath is 80 Deg C. They are then dried. 3.Hot Fluxing. The pipes are then transferred to a hot flux bath. The flux is specially formulated and in molten stage. The temperature is 740 to 760 Deg. C . The Pipes are immersed in this flux bath for 7 to 10 minutes. They are then transferred immediately into a bath containing molten Aluminum Alloy. 4.Hot Dip Aluminum Coating. The hot flux treated pipes are dipped in Aluminum Alloy. The Alloy contains 7% to 9% Silicon. The Temperature is 770 Deg C. The pipes are dipped for about 7 minutes. They are then removed, and while passing over the magnetic rolls, excess aluminium is removed with a blast of compressed air. Outside excess aluminium is removed using a air wiper and the inside aluminium is removed using a compressed air blast. They are then dipped into a tank of water to cool down and dried. Chromate passivation is done if required 2 5.Inspection & Packing The pipes are individually checked for their coating and defects if any. After acceptance they bundled and packed. DATED THIS 12,th DAY OCTOBER 2006 SUNIL SHANTISARUP GUPTA (SIGNATURE OF APPLICANT) 3 |
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1699-mum-2006-abstract(complete)-(13-3-2007).pdf
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1699-MUM-2006-FORM 2(CANCELLED PAGES)-(9-6-2009).pdf
1699-mum-2006-form 2(complete)-(13-3-2007).pdf
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1699-MUM-2006-FORM 2(TITLE PAGE)-(30-11-2009).pdf
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1699-mum-2006-form 2(title page)-(complete)-(13-3-2007).pdf
1699-mum-2006-form 2(title page)-(granted)-(9-2-2010).pdf
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1699-mum-2006-form 9(13-3-2007).pdf
1699-MUM-2006-SPRCIFICATION(AMENDED)-(30-11-2009).pdf
| Patent Number | 238527 | ||||||||
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| Indian Patent Application Number | 1699/MUM/2006 | ||||||||
| PG Journal Number | 8/2010 | ||||||||
| Publication Date | 19-Feb-2010 | ||||||||
| Grant Date | 09-Feb-2010 | ||||||||
| Date of Filing | 16-Oct-2006 | ||||||||
| Name of Patentee | SUNIL SHANTISARUP GUPTA | ||||||||
| Applicant Address | FLAT NO-1, 3rd FLOOR, MITRA KUNJ 16, PEDDER ROAD, MUMBAI 400026, | ||||||||
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| PCT International Classification Number | C23C1/08 | ||||||||
| PCT International Application Number | N/A | ||||||||
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