Title of Invention

A METHOD OF HOT DIP ALUMINIUM COATING ON STEEL PIPES/SECTIONS SURFACES

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
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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)

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Documents:

1699-mum-2006-abstract(complete)-(13-3-2007).pdf

1699-mum-2006-abstract(granted)-(9-2-2010).pdf

1699-mum-2006-cancelled pages(30-11-2009).pdf

1699-MUM-2006-CLAIMS(9-6-2009).pdf

1699-MUM-2006-CLAIMS(AMENDED)-(30-11-2009).pdf

1699-mum-2006-claims(complete)-(13-3-2007).pdf

1699-mum-2006-claims(granted)-(9-2-2010).pdf

1699-mum-2006-correspondence(13-3-2007).pdf

1699-MUM-2006-CORRESPONDENCE(30-11-2009).pdf

1699-MUM-2006-CORRESPONDENCE(9-6-2009).pdf

1699-mum-2006-correspondence(ipo)-(16-2-2010).pdf

1699-mum-2006-description (provisional).pdf

1699-mum-2006-description(complete)-(13-3-2007).pdf

1699-MUM-2006-DESCRIPTION(COMPLETE)-(9-6-2009).pdf

1699-mum-2006-description(granted)-(9-2-2010).pdf

1699-MUM-2006-FORM 26(30-11-2009).pdf

1699-MUM-2006-FORM 1(16-10-2006).pdf

1699-MUM-2006-FORM 1(9-6-2009).pdf

1699-mum-2006-form 18(9-4-2007).pdf

1699-mum-2006-form 2(30-11-2009).pdf

1699-mum-2006-form 2(9-6-2009).pdf

1699-MUM-2006-FORM 2(CANCELLED PAGES)-(9-6-2009).pdf

1699-mum-2006-form 2(complete)-(13-3-2007).pdf

1699-mum-2006-form 2(granted)-(9-2-2010).pdf

1699-MUM-2006-FORM 2(TITLE PAGE)-(30-11-2009).pdf

1699-MUM-2006-FORM 2(TITLE PAGE)-(9-6-2009).pdf

1699-mum-2006-form 2(title page)-(complete)-(13-3-2007).pdf

1699-mum-2006-form 2(title page)-(granted)-(9-2-2010).pdf

1699-MUM-2006-FORM 3(9-6-2009).pdf

1699-MUM-2006-FORM 5(9-6-2009).pdf

1699-mum-2006-form 9(13-3-2007).pdf

1699-mum-2006-form-2.doc

1699-mum-2006-form1.pdf

1699-mum-2006-form2.pdf

1699-mum-2006-form3.pdf

1699-MUM-2006-SPRCIFICATION(AMENDED)-(30-11-2009).pdf


Patent Number 238527
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,
Inventors:
# Inventor's Name Inventor's Address
1 SUNIL SHANTISARUP GUPTA FLAT NO-1, 3rd FLOOR, MITRA KUNJ 16, PEDDER ROAD, MUMBAI 400026,
PCT International Classification Number C23C1/08
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA