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The present invention relates a process of galvanizing. More particularly the present invention relates to a process of hot clip gavalizing from Zn - 0.2 % Al, 1 % Mg bath to obtain maximization of delta phase presence in the coating.
BACKGROUND OF THE INVENTION
In the convention process of continuous hot dip galvanizing of cold rolled steel trips in molten zinc bath containing very little aluminium.
But the delta phrase in the coating by the convention process is obtained by post galvanizing heat - Treatment
The present invention relates to a process of galvanizing which enable the existing coating process to either partially or completely by pass the post galvanizing heat, - treatment without impairing
any adverse effect but to delta phase appearance in the coating.
OBJECTS OF THE INVENTION
It is therefore, an object of the present invention to propose a process of hot dip galvanizing from Zn - 0.2 % A % Mg bath to maximization

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of delta phrase presence in the coating which eliminates the disadvantages of prior Art.
Another object of the present invention is to propose a process of hot dip galvanizing from Zn - 0.2 % Mg bath to maximization of delta phrase presence in the coating which eliminates post heat - treatment of galvanized process.
A further object of the present invention is to propose a process of hot dip galvanizing from Zn - 0.2 % Al - 1 % Mg bath to maximizing of delta phrase in the coating which reduces the cost of production.
A still further object of the present of the invention is to proposes a process of hot dip galvanizing from Zn - 0.2 % Al - 1 % Mg bath to maximization of delta phrase presence in the coating which eco-friendly.
An yet further object of the present invention is to proposes a process of hot dip galvanizing from Zn - 0.2 % Al - 1 % Mg bath to maximization of delta phrase presence in the coating which increases the life of coating articles.

4 SUMMARY OF THE INVENTION
The present relates to a process of continuous hot galvanizing of cold rolled steel strips is carried out in molten zinc bath with very little aluminum. In the present work the hot dip galvanizing of cold roiled steel strips was carried out in Zn - 0.2 % Al - Mg bath at laboratory scale. The coating has been found to show preferential Mg presence at the top which would give sacrificial protection to Zn and therefore would increase the life of such coated product. Moreover, the coating h
As shown presence delta phase in significant proportion in the coating. The delta phase in the coating is obtained by post galvanizing heat treatment. Moreover, preferential Mg built up top of the coating would also enhance life of the coating by giving sacrificial protection. The presence of Mg in the coating reduce the thickness of inhibition layer and therefore it outburst and Fe-Zn intermelallie phase evolution take has taken place in the coating in present hot dip galvanizing experiment.
RESULT
Figure 1: Comparative elemental depth profile of the coating obtained from without Mg and with Mg bath. The reduction in the thickness of Ai hump is shown due to presence of Mg in the coating.

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Figure 2: The depth of the coating obtain from Zn - .02 % Al - 1 % Mg bath. The coating thickness is around 7 pm out of which 3-4 pm thickness shows around 10 % Fe in coating. The Mg built up at the coating can be also seen.

6 WE CLAIM
1. An improved process of hot - dip galvanizing to obtain maximum
delta.
Phase presence in the coating comprising:-
a galvanization bath containing a composition of
0.2 - 0.4% Al 1.0 - 2.0% Mg and rest Zn
2. The galvanization bath containing such composition as claimed in
claim 1 where in galvanizing bath material is being heated to 450 c-470 c for effective working.
3. an improve process of hot dip galvanizing to obtain maximum delta
phase presence in the coating as substantially described and
illustrate her in with reference to accompanying figures.

The present relates to a process of continuous hot galvanizing of cold
rolled steel strips is carried out in molten zinc bath with very little
aluminum. In the present work the hot dip galvanizing of cold rolled
steel strips was carried out in Zn - 0.2 % Al - Mg bath at laboratory
scale. The coating has been found to show preferential Mg presence
at the top which would give sacrificial protection to Zn and therefore
would increase the life of such coated product. Moreover, the coating
h
As shown presence delta phase in significant proportion in the coating.
The delta phase in the coating is obtained by post galvanizing heat
treatment. Moreover, preferential Mg built up top of the coating would
also enhance life of the coating by giving sacrificial protection. The
presence of Mg in the coating reduce the thickness of inhibition layer
and therefore it outburst and Fe-Zn intermelallic phase evolution take
has taken place in the coating in present hot dip galvanizing
experiment.
RESULT
Figure 1: Comparative elemental depth profile of the coating obtained
from without Mg and with Mg bath. The reduction in the thickness of
Al hump is shown due to presence of Mg in the coating.

Figure 2: The depth of the coating obtain from Zn - .02 % Al - 1 %
Mg bath. The coating thickness is around 7 pm out of which 3-4 pm
thickness shows around 10 % Fe in coating. The Mg built up at the
coating can be also seen.