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FINISHING PROCESSES
SUBMITTED BY:
ROHI GOYAL(041821)
PRATIUSH TYAGI(041816)
SUMEET TREHAN(041823)
AMIT CHADHA(041806)
LALIT MOHAN (041813)
RAJESH UMAR(04181!)
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ANODISING
" A#$%&' & * +,-.#&/, ,% +$ $%& +.,*-, $ * ,+*5
" I+ * 7$&%, ,*+, -$$&$# ,&+*#-,9
-,*+, * %&,,#+ *-, +$7$*7. *#%-.*#, +., -+*5 +-+, -5$, +$ +., ,+*5*-,
" T.& 7$-, %,&, &+ #*, $ +., *-+ +.*+
+., 7*+ +$ , +,*+,% $ +., *#$%, 7$+&$# $*# ,5,-+&- -&-&+ +.& ,5,-+$5+&- 7$-,
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ANODISING OF A5
" I# +., *#$%& 7$-,9 +., #*+*5 $;&%,
5*, $# A5 & ,75*-,% * +.&-
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" I# -$$&, ,#&$#,#+ +., +.&-&-$,+,9 =.&5, +.#, 5*, * ,
&-&,#+ &5%, -$#%&+&$#" T., *#$%&- 5*, & /&+, 7$$ *#%
$%, +$ ,+ $$% -$$&$# 7$+,-+&$# *
,*5 $ +., 5*, & #$*55 %$#, .$+=*+, $ +,*
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" T., 7**,+, $ +.& 7$-, #,,% +$ ,-*,55 -$#+$55,% +$ ,+ *;& -$$&$#7$+,-+&$#
" T., $;&%, 5*, & *# ,5,-+&-*5 *+$ *#% *5$# * &+ & ,, $ *5+ &+ =&55 , * , $$%7$+,-+&$# **+ *5*#&- -$$&$#
" B,$, ,*5 %&,,#+ %, -*# , *%%,% +$+., $;&%, 5*, $ -$5$
" T., *-, =&55 ,-$, .*% *#% *&5 ,&+*#++$ =,*9 **&$# *#% -*+-.
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" H$=,, 9 *#$%& =&55 #$+ &, * 5$#
+, 7$+,-+&$# **+ +$# *-&% $
*,
" T.& & %, +$ +., %,-,*,% +*&5&+ $
+., $;&%, 5*, *+ .&. *# 5$= 7H
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METHODS OF ANODISING
" BATCH ANODISING:?
I#$5, *-
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CONTINOUS COIL ANODISING
I#$5, -$#+$ #=% $ 7,?$55,% -$&5
+.$. * ,&, $ *#$%& ,+-. *#%
-5,*# +*#
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ANODISINGS BENEFITS
" D*&5&+
" C$5$ +*&5&+
" E*, $ M*+,#*#-," A,+.,+&-
" C$+
" H,*5+. *#% *,+
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MECHANICAL CONSIDERATIONS
" A#$%& =&55 *&, +., *-,9 -, +., $;&%, -,*+,%$--7&, $, 7*-, +.*# +., *, ,+*5 -$#,+,%
" T.& =&55 ,#,*55 #$+ , $ -$#,/,#-, ,;-,7+ -*,$# *55 .$5, +.,*%,% +$ *--,7+ -,=*#$%&
* -*, -,= +$ %9 +. +., +.,*%,% .$5, *#,,% +$ , -.*,% =&+. * +*7 +$ ,+$, +., $&*5%&,#&$#
" I# -*, $ #+.,*%,% .$5, +.*+ *--,7+ -,= $ 7 *5&.+5 $,&',% .$5, +$ *55$= +., %&,#&$# -.*#,* , *77$7&*+,
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USES
" A#$%&,% A5 -*# , $#% &P$% #*#$9-$$
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PD PROCESS
" I+ & * +,-.#&/, ,% +$ %,7$&+ +. &5 $
*&$ *+,&*5 $#+$ *&$ *-, (, $
,&-$#%-+$ =*,) 7.&-*5 ,*#
" I+ & #%*,#+*55 * *7$&*+&$# -$*++,-.#&/,9 $5 +*#, $ *+,&*5 $# *#
*+$&- 5,,5
" I+ & *# *5+,#*+&, 7$-, +$ ,5,-+$75*+
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HO DOES PD OR
" PD 7$-,, *, -*&,% $+ #%,
*- -$#%&+&$#
" T., 7$-, $5, $ +,7:?
E*7$*+&$#
T*#7$+*+&$#
R,*-+&$#D,7$&+&$#
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EAPORATION
" D +.& +*,9 * +*,+9 -$#&+ $
+., *+,&*5 +$ , %,7$&+,% & $*%,%
* .&. ,#, $-, -. * * ,*
$ ,5,-+$# $ &$#
" T.& %&5$%, *+$ $ +., *-, $
+., +*,+9 *7$& +.,
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TRANSPORTATION
" T.& 7$-, &75 -$#&+ $ +.,
$,,#+ $ *7$&,% *+$ $ +.,
+*,+ +$ +., +*+, +$ , -$*+,% *#%
=&55 ,#,*55 , * +*&.+ 5, **&
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REACTION
" I# $, -*, -$*+ =&55 -$#&+ $ ,+*5$;&%,9 #&+&%,9 -*&%, *#% $+., -.*+,&*5
" I# +.,, -*,9 +., +*,+ =&55 -$#&+ $ +.,,+*5 T., *+$ $ ,+*5 =&55 +.,# ,*-+ =&+.+., *77$7&*+, * % +., +*#7$+ +*,
" F$ +., *$, ,;*75,9 +., ,*-+&, *, *
, $;,#9 #&+$,#9 *#% ,+.*#,
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DEPOSITION
" T.& & +., 7$-, $ -$*+ &5% 7 $#
+., +*+, *-,
" D,7,#% $# +., *-+*5 7$-,9 $,
,*-+&$# ,+=,,# +*,+ *+,&*5 *#% +.,
,*-+&, *, * *5$ +*
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U*,
" I7$,% .*%#, *#% =,* ,&+*#-,
" R,%-,% &-+&$#
" I7$,% $;&%*+&$# ,&+*#-," L$#, -$7$#,#+ 5&,
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ADANTAGES
" M*+,&*5 -*# , %,7$&+,% =&+. &7$,%7$7,+&, -$7*,% +$ +., +*+,*+,&*5
" A5$+ *# +7, $ $*#&- *+,&*5 -*#, ,% * =,55 * $,
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DISADANTAGES
" I+ & ,;+,,5 %&&-5+ +$ -$*+ #%,-+*#% &&5* *-, ,*+,
" H&. -*7&+*5 -$+
" S$, 7$-,, $7,*+, *+ *- *#%+,7 ,/&
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APPLICATIONS
" A,$7*-,
" A+$$+&,
" S&-*5,%&-*5" D&, *#% $5% $ *55 *##, $ *+,&*5
7$-,
" C++ +$$5" F&, *
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CD PROCESS
" CD & -.,&-*5 ,*-+&$# =.&-.
+*#$ *,$ $5,-5,9 -*55,%
7,-$9 +$ * $5&% *+,&*59 +., $
$ +. &5 $ 7$=%,9 $# +., *-, $ *+*+,
" T.& 7$-, & =&%,5 ,% +$ *&-*+,
,&-$#%-+$ %,&-,
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TYPES OF CD PROCESSES
" CD -$, 7$-,, -. *:?
A+$7.,&- P,, C.,&-*5 *7$D,7$&+&$# (APCD)
M,+*5?O*#&- C.,&-*5 *7$D,7$&+&$# (MOCD)
L*, C.,&-*5 *7$ D,7$&+&$#
(PCD)P.$+$-.,&-*5 *7$ D,7$&+&$# (PCD)
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HO DOES CD ORS
" P,-$ *, ($+,# %&5+,% -*&,*,) *, %,5&,,% +$ ,*-+&$#-.*, *+ *77$;&*+,5 *&,#+ +,7
" A +., 7* $, $ -$, +$ -$#+*-+=&+. * .,*+,% +*+,9 +., ,*-+ $%,-$7$, $ * $5&% 7.*, =.&-.
*#% *, %,7$&+,% $#+$ +., +*+,
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COATING CHARACTERISTICS
" F, *,%
" I7,&$
" H&. 7&+
" H*%, +.*# &&5* *+,&*5 7$%-,% -$#,#+&$#*5 -,*&- *&-*+&$#7$-,,
" T.,, -$*+ *, *55 $#5 * ,=&-$# +.&-< *#% ,#,*55 %,7$&+,% *+*&5 5$= *+,
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CD APPARATUS
" G* %,5&, +,
" R,*-+$ -.*,
" S+*+, 5$*% ,-.*#&
" E#, $-,
" *- +,
" E;.*+ +,
" E;.*+ +,*+,#+ +,
" P$-, -$#+$5 ,/&7,#+
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ENERGY SOURCES
" R,&+&, .,*+ , +, #*-,
" R*%&*#+ .,*+ , .*5$,# 5*7
" R*%&$ ,/,#- .,*+ , %-+&$#.,*+
" L*,
" O+., $-, * -5%, U?&&5, 5&.+$ 5*, * * $-, $ 7.$+$ ,#,
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PRECURSORS
" M*+,&*5 *, %,7$&+,% $ +., *,$ +*+,% CD
" T. 7,-$ $ CD 7$-,, + ,
$5*+&5,9 + *+ +., *, +&, +*5, ,#$. +$, *5, +$ , %,5&,,% +$ +., ,*-+$
" G,#,*55 7,-$ -$7$#% =&55 $#5 7$&%,* , ,5,,#+ +$ +., %,7$&+,% *+,&*59 =&+.
$+., , $5*+&5&,% % +., CD 7$-,
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TYPICAL PRECURSOR
MATERIALS
" H*5&%,?T&C549 T*C5> ,+-
" H%&%,?S&H49 G,H49NH3 ,+-
" M,+*5 A5
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CD G* P$%-+
" A# $+,# #,5,-+,% ?7$%-+ $ +., CD
7$-, *, $5*+&5, *,
" H$=,, +.,, *, * , +$;&-9
5**5, $ -$$&, $ + , +,*+,%
*77$7&*+,5
" A#*5& $ +., $?*, -*# 5,*% +$ *
,++, #%,+*#% $ +., CD ,-+&$#
,-.*#&
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APPLICATIONS
" C$*+
" S,&-$#%-+$ *#% ,5*+,% %,&-,
" D,#, +-+*5 7*+
" O7+&-*5 &,
" C$7$&+,
" P$%-+&$# $ #$,5 7$=%, *#% &,
" C*+*5+
" N*#$*-.,
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Galvanization
Introduction:
Galvanization$ galvanisation,, +$ *# $ ,,*5
,5,-+$-.,&-*5 7$-,, #*,% *+, +., I+*5&*#-&,#+&+ L&& G*5*#&
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H&+$
" O&*559 *5*#&'*+&$# =* +., *%&+*+&$# $ ,5,-+&- .$-
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D,&+&$#
" K- -$*+ 7,,#+ $;&%*+&$# $ +., 7$+,-+,%
,+*5 $ * *&,9 *#% *-+ * *
*-&&-&*5 *#$%,& +.& *&, & %**,% K-
$;&%, & * , =.&+, %+ +.*+ ( -$#+*+ +$ &$#$;&%,) %$, #$+ -*, * ,*
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HOT DIP GALANIKING
H$+?%&7 *5*#&' & +., 7$-, $ -$*+ &$#$ +,,5 =&+. * +. '- 5*, 7* +.,+,,5 +.$. * $5+,# *+. $ '- *+ *+,7,*+, $ *$#% 4>0C K- + +$$ '- $;&%,9 * *&5 +$# *+,&*5 +.*++$7 +., + 7$+,-+ +., +,,5 ,5$=$ +., ,5,,#+ G*5*#&',% +,,5 & =&%,5,% *775&-*+&$# =.,, + ,&+*#-, &
#,,%,%9 *#% -*# , &%,#+&&,% +.,-+*5&'*+&$# 7*++,# $# +., *-, ($+,#-*55,% * 7*#5,)
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G*5*#&',% -$*+
" T., *$, 7.$+$&-$*7. *#% *--$7*# &,,7,,#+ * +7&-*5 -$ ,-+&$# $ * .$+ %&7 *5*#&',%-$*+ T., $+,$+ (E+*) 5*, $ +., -$*+ & $,%* * -$, $ 7, '- +.*+ & -*&,% $+ $# +., *+,&*5* &+ & =&+.%*=# $ +., $5+,# '- *+. T.,
#%,5 ,&, $ '-&$# *55$ +., -$*+ *, +.,,5+ $ * ,+*55&-*5 ,*-+&$# ,+=,,# $5+,# '- *#%+., +,,5 $ &$# *+,&*5 , *5*#&',% A +., '-&$#*55$ $9 +., =&55 $= 7,7,#%&-5*5 +$ +., +,,5*-, T., ,,-+ +.& .* $# -$#, *#% ,%, $
*+,&*5 & +.*+ +., -$*+ +.,, & ,#,*55 +.&-
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" T., *5*#&',% -$*+ &+,5 & -$#&%,,% +$ , * ,5 ,-++, T.& & ,-*, +., ,*-+&$# ,+=,,# +., $5+,# '- *#% +.,+,,5 =&55 #$+ $-- #5, +., +,,5 *-, & -.,&-*55 -5,*# I#,,-+9 * *5*#&',% -$*+ +.*+ *77,* $#% *#% -$#+$ & *-+ $#% *#% -$#+$ I * -$*+ .$5% ,-$, %**,%.$=,,9 +., '- =&55 -$#+, +$ 7$&%, -*+.$%&- 7$+,-+&$# +$ +.,,;7$,% +,,5 E,# & *,* * -. * 14 -. 5,#+. *#%$
=&%+. ,-$, ,;7$,%9 +., $#% '- =&55 7$&%, -*+.$%&-7$+,-+&$# +$ +.& *,* * 5$# * +., -$*+ 5*+" A $ ,-.*#&-*5 7$+,-+&$#9 +., *5*#&',% '- -$*+ 5&+,*55
,-$, 7*+ $ +., +,,5 +*+, +.9 *# *%.,&$# $#% $# +.,$%, $ ,,*5 +.$*#% 7& ,;&+ ,+=,,# +., +=$ A5$9 -, +.,'-&$# *55$ *, .*%, +.*# +., #%,5 +,,59 +., =&55 7$&%,,;-,55,#+ **&$# ,&+*#-, +$ +., *5*#&',% *+&-5, T., E+* 5*, &
,5*+&,5 %-+&5, *#% *5$ -$#+&+, +$ +., 7$+,-+&$# $ +.,*5*#&',% *+,&*5 7$&% $$% &7*-+ ,&+*#-, T.,-$*+&$# $ *55 +.,, 5*, +$ 7$%-, +., *5*#&',% -$*+$&%, +$.#, *#% ,&+*#-, +$ ,-.*#&-*5 %**, +*#7$+9,,-+&$# *#% ,&-,
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7$-,:
" T., 7$-, $ .$+ %&7 *5*#&' ,5+ * ,+*55&-*5 $#%,+=,,# '- *#% +,,5 =&+. * ,&, $ %&+-+ &$#?'- *55$ T.,,5+ -$*+,% +,,5 -*# , ,% -. +., *, =* * #-$*+,%G*5*#&',% +,,5 -*# , =,5%,%9 .$=,, $#, + ,;,-&, -*+&$#*$#% +., ,5+ '- , $ =,5% G*5*#&',% +,,5 &&+*5, $ .&. +,7,*+, *775&-*+&$# $ 7 +$ 200C U, *++,7,*, *$, +.& 5,,5 =&55 ,5+ 7,,5 $ +., '- *+ +.,
+,,+*55&- 5*, G*5*#&',% .,,+ +,,5 & -$$#5 ,% *+$$+&, *#*-+, +$ ,#.*#-, -$$&$# 7,$*#-, $ ,;+,&$$% 7*#,5 $ $, $%,5
" S+,,5 +&7 -*# , .$+?%&7 *5*#&',% * -$#+$ 5, H$+?%&7*5*#&',% +,,5 +&7 (*5$ $,+&, 5$$,5 ,,,% +$ **5*#&',% &$#) & ,;+,#&,5 ,% $ *775&-*+&$# ,/& +.,
+,#+. $ +,,5 *#% ,&+*#-, +$ -$$&$# A775&-*+&$# -5%,:$$ *#% =*55 -$#, *775&*#-, *#% *+$$+&, $% 7*+O#, -$$# , & ,+*5 7*&5
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A55 *5*#&' -$#&+ $ $ #%*,#+*5
+,7:
" S*-, 7,7**+&$#
" P,5;
" G*5*#&'
" F&.
PICKLINGPICKLING FlUXING GALVANIZINGGALVANIZING
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PICKLINGPICKLING FlUXING GALVANIZINGGALVANIZING
FINISHINGFINISHING
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" T., 7,7**+&$# +,7 -$#&+ $ -5,*# *#% 7&-
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F*-+$ *,-+ +., +.&-
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T., -.,&-*5 -$7$&+&$# $ +,,5:
" T., -.,&-*5 -$7$&+&$# $ +., +,,5 & , &7$+*#+ +$ +., /*5&+ $+., *5*#&',% -$*+ -, * ,+*55&-*5 ,*-+&$# ,+=,,# +., '-*#% +., &$# & $--
" A *# ,;*75,9 &5&-$# -$#+,#+ +., +,,5 ,+=,,# 00> ? 011*#% *$, 02> =&55 -*, +., '-&$# *55$ 5*, +$ $=*#$*55 *+ I# *-+9 +., &5&-$# -*, +., *5*#&' ,*-+&$# +$-$#+, #**+,% *#% +., $+,$+ 7, '- 5*, & ,,#+*55-$#,% +., 7$-, T.& #$+ $#5 -*, +., -$*+ +$ ,+.&-
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GENERAL CONSIDERATIONS
T., ,#,&- -$7$&+&$# $ * +,,5 +$ , *5*#&',% +.*+=&55 7$%-, *# *--,7+*5, -$*+ =&55 , -*$# 5,+.*# 02>9 7.$7.$$ 5, +.*# 00> *#%*#*#,, 5, +.*# 13 A5$9 * %&-,% *$,9
$%, +$ *$&% +., *%,, ,,-+ $ &5&-$# $# +.,*5*#&',% -$*+ &5&-$# -$#+,#+ +., +,,5 .$5% , +., *#, $ 0?004 $ 01>?02> S+,,5 =&+. +.,,,-$,#%,% 5,,5 .$5% %,,5$7 * #$*5*5*#&',% -$*+ H$=,,9 .$5% +., -$7$&+&$# $
+.,, ,5,,#+ *55 $+&%, *# $ +., 7,&$5 +*+,%*#,9 +., +,,5 =&55 $+ 5&
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S*-, -$#%&+&$# $ +,,5:
" I# ,#,*59 $. +,,5 *-, =&55 -*,
+., *5*#&' ,*-+&$# +$ 7$%-, +.&-
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B*+. &,&$# +&,
" G*5*#&' & * %&&$# 7$-,
" A =&+. *55 %&&$# 7$-,,9 +., ,*-+&$#
,+=,,# +., $5+,# '- *#% +., +,,5 $ &$# =&55
7$-,,% /&-
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B*+. =&+.%*=*5 *+,
" T., =&+.%*=*5 *+, $ *+,&*5 $ +.,*5*#&' *+. .* +., ,*+,+ ,,-+ $# +.,$+,$+ 5*, $ 7, '-
" A *7&% =&+.%*=*5 =&55 7$%-, +., +.&-
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STEEL C$$5 *+,
" S5$=, -$$5 *+,9 -. * +.$, ,;7,&,#-,%=&+. *& -$$5 $ ,,# =&+. +.&-
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B,#,&+ $ G*5*#&'
" L$=,+ F&+ C$+ ? H$+ D&7 G*5*#&' & 5$=, &+ -$+ +.*#*# $+., -$$#5 7,-&&,% 7$+,-+&, -$*+ $ +,,5
" L, M*+,#*#-,L$=,+ L$# T, C$+ ? E,# -*, =.,,+., &+&*5 -$+ $ .$+ %&7 *5*#&' & .&., +.*# *5+,#*+&,-$*+ .$+ %&7 *5*#&' & *5$+ *&*5 $, -$+ ,,-+&, +., 5$# +, ,-*, &+ 5*+ 5$#, *#% #,,% 5, *+,#*#-,
" L$# L&, ? T., 5&, ,;7,-+*#- $ .$+ %&7 *5*#&',% -$*+ $#+7&-*5 +-+*5 ,, & * ,;-, $ >0 ,* $+ *5,#&$#,#+9 *#% 20 +$ 2> ,* 759 ,,# ,,, *# *#%-$*+*5 ,;7$,
" R,5&*&5&+ ? G*5*#&' *+ M,+*575*+, & -*&,% $+ +$ +., *77$7&*+,ASTM +*#%*% $ .$+ %&7 *5*#&' C$*+ 5&, *#%
7,$*#-, *, ,5&*5, *#% 7,%&-+*5," T$.,+ C$*+ ? A .$+ %&7 *5*#&',% -$*+ .* * #&/,
,+*55&-*5 +-+, =.&-. &, $++*#% ,&+*#-, +$,-.*#&-*5 %**, +*#7$+9 ,,-+&$#9 *#% ,&-,
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" A+$*+&- P$+,-+&$# F$ D**,% A,* ? H$+ D&7 G*5*#&',%-$*+ -$$%, 7,,,#+&*55 +$ +,,59 7$&% -*+.$%&- $ *-&&-&*57$+,-+&$# +$ *55 *,* $ +,,5 ,;7$,% +.$. %**, U#5&
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Chrome plating& * &. +,*+,#+ +&5&'+., ,5,-+$5+&- %,7$&+$# $ -.$& T., $+-$$# $ $ -.$, 75*+ & +., +.%,-$*+&, bright chrome9 =.&-. & +7&-*55 *
10 5*, $, * #%,5 #&-
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T.,, *, +=$ +7, $ -.$& 75*+:
1. INDUSTRI! C"R#$% &!TING
'. D%C#RTI(% C"R#$% &!TING
I#%+&*5 C.$& 75*+ & *5$ -*55,% *
H*% $ ,#,,,% -.$,
T. + + & % + & 5
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T.,, *, +=$ +7, $ %+&*5
-.$& 75*+ $5+&$#:
1. "e)avalent chromium *+. =.$,* ,%&,#+ & -.$&- *#.%&%,
2 T&*5,#+ -.$& *+. =.$, *
,%&,#+ & -.$& 5*+, $-.$& -.5$&%,
T&*5,#+ -.$& *+. *, #$+ ,+
-$$#9 %, +$ ,+&-+&$#-$#-,# -$5$9 &++5,#,9 *#% 75*++.&-
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"ard Chrome &lating" M$+ 7,$75, =$5% #$+ , , *&5&* =&+. .*% -.$, 75*+ H*%
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