!F+aG@Em&7k1Ba@&(s - s -s -s - 1 , -
7
-90 -80
-70
-60
2 -50
-40 -30 2 1 -2 7
(c)
ABTSPS uchrornate mYL112 a l l o y
-20 -10 2 4 6 0 - 2 -90 -80
- 70
0
1
0
1
2
3
4
5
6
Log f / Hz
BTSPS BTSE
24 h 1.87 x 1 0 - ~ ( 0 . 8 1 )
GPTMS
10 min 2.46~10-'(0.95) 24 h 2.78 x 1 0 - ~ ( 0 . 7 6 )
CPE.,,/F.
cm2(n)
10 min 24 h 10 min 7 . 6 2 x 1 0 - ~ ( 0 . 9 4 ) 1 . 7 9 ~ 1 0 - ~ ( 0 . 9 2 ) 1.67 xlO-"0.91)
BTSE BTSPS 7k@@m$ig-$r: %!-Xsm6i JE BTSE BTSPS B:&fiuAFIJpH = 4 5 p @N
&&!F7km?E&%BJ ,KEZtL@% \&%37kRF E@@BtEG%, k%@Btk~%%~l\%@E@@@t @mfifcv,t~% 4: 6: 90[9-12.141 ,i~jE7;( <2OT)%@ $€I#. & El 2a ,2c KlE,@1Eik&39E~BtEB&T% l%l@#+€BhR# min G,BB7k@5d - 6 d , @ 60 ?@&&BN*&39%e&mP!tEB, & TBBtE@ iiE6i~EE%%E7k#, SE22ki&%i@&39i3 H% Efl&G$&@%@@@3(,H20.02 I;il@E@ (1ef j$)+@GXJ@4E'@'&+ min - 3 min @ * , A ,NThT@%e&2&#@@B$Ei%.2b,2d SiJ 2 & El JL ,kg 10 min @@G, j&&@$% Hz & ,@% lo3 130T 60 mn i. H M273A JIB${?~XN M5210 $fi$I$h%#377 ik?&#@*R-+fl$I'EJ*B, im*&E%e&N% ~) $ik%%$i?( PDS)?F4X,%a&+E%H+B&+E,@ @&&39?.&#j!£#{%m@$( 1 0 ' ~ &&Bj?LIj +fl$1'87#?B.&T&@fl$I'EJ #?B%@EW@E$Ix$ tL$tE% Ag - AgCl &+E.%&i?#4X%3.5mass% NaCl &#E'@'&qajT ,j'!i!~X&E%$#'~, %&{$iliIi E, + ~ $ I ' ~ ~ % B SHC) % z m e a G # , f i lo2 Z s $ j m %-2.0 V -2.0 V,$jEj$@% mV/s,@J 5.0 i%@fl$rd*&%%mE%ik@E$IX$G, 24 h 222 E@G,Gi%@&XLIj8-+Rmfl$[EJ*B72%g X ~ ~ ; ~ X # G @ M E + E min. H pt ma 40 ~ & $+ti .@jTUtt%$+B( SCE) %@ tL&+Bmz&+E@ S#EE*B@. % ,T M 273 'lB&iGiXN M5210 $fi$€I$h%#LII&m %Tx$BtEBiE+2E%ikG?fl@T#,a3 @ Z L W T Q ~ ~ + B ~EIS) MX. ~ F ~ X B $ x$$1iGfi EliB%fi%REl 3 P i i s m % @ $ E~E( ~ B ~[12,14,15,17] ,fi?F4?&%%%R4E%~B@/l\~%tfl& @j{g3B@4@i miEijZ@,t@$$jW%10 mHz 10 mV
%27$%3# 2007 6
Journal of Chinese Society for Corrosion and Protection
q @R@%B$p%$B
Vol. 27 No. 3 Jun. 2007
)I$=: % H @ % A I Z ,H = 4 pH
- 5 ,#$Re%
< 3 % @I 3 ifrp@%l?FP y - %7ktt@iB#mE;ZF;6&.E( $E i
+
%m$IB$E,R30,%&#E@%&W,C,n,%&&m% Ei$€l$$, C,,,%@E&@.
q H , &TX#G$#E%%+B@ 10 min #*E!ikR@,E@4X%%EEl 3a iBqT# f i ; & E l 2 d qH,LIjRi%@B$I's7#?&,%%EE&I.66 @ ,Z?F4X%%EEl3b 2H7@fi,tU&%%4~% 1.
(2)
-
(3)
H& 3 H64%2tr97k%E%ZI]&BG&&&~,
%H#HEMH4kIZH4kG , H $ I k Y Z & H R %
{I (&
3. 5mass% NaCl '@\@+@~Y(lmj'@~B.
YL12
Gg$.l&i3#R*%
@I0 mm, g E % 2
m ,R f k % & e ( mass% ) % Zn 0.25 % ,M 1.2% m g 1.8%, Cu 3.8% 4 . 9 % , Fe 0 . 5 % , Si 0 . 5 % , Mn 0.3% -0.9% ,Cr 0. 1%. H 600'V>%fIJ@%%,fi
Log f / H z
6C
0 GPTMS
BTSE
' - 5N I) S
ABTSPS
chromate
-60
\
Q
-50 -40 -30 -20
0 1
321 - 2 - 1
I
-10 0 1 2 3 4 5 6 ' ) 2 - 1 0 1 2 3 4 5 6
Log f / Hz
Log f /Hz
-
Fig. 2 EIS Bode plots and fitted EIS plots with the equivalent electric circuit models obtained for bare and pre
-1.5
-S-S-R (5)
-9
8
-7
-6
-5
-4
-3
-2
1
E+ ,n,n,,n2%$1EH%E$k&%B,H= n l + n2. n
BTSPS 0-Si.Si-0-SiNCu-S
Log I / A
cm-2
@%a@jzm%memim ~ 1 +[EJ@,UBBTSPSg
Fig. 1 Polarization curves of untreated YL12 alloy, chromate, GPTMS ,BTSE and BTSPS in 3.5% NaCl solution
Fig. 3 Equivalent electric circuit models for numerical simulation of the EIS results obtained on the silanes pre -treated YL12 alloys
Table 1 Fitting results for BTSPS, BTSE and GPTMS pre - treated substrates obtained from the equivalent circuit
%$nAEll pH = 4 - 5 i.lfc@@7k%B+,4$%%%%
4%
,Wj7;( <20% )@@l;f7@%+&j~#$j#+ 60 min,
E G t E & @ & B S M % e & S % B & 7 k @ H GmMS $@@+ min , q & @ & # & 95% B i t 6 0 min. 10
GPTMS)
.
XX- ( ( Z S . S @ ) ZE(BTsE)RlXJ - [ y - (ZL%E;@)mE;] e4%.lk#(BTSPS)X$ YL12 %&&&@i!?KifiB, GPTMS @ U & % @ E g X g % ) j j IOOT x 60min Rl 130°C x 60min I z H & , # H % & $ G ( P D S ) @ $ & W B E , i g
fiB2b
t u & % ~:s ~ ~ m e ~ m & m n j F n t f i 9 @E