ࡱ> HJGoY bjbjWW |==q]:::NNNNNbDNW- $eY:"(8:NNC  H":OݽNNCYSTEINE AS CORROSION INHIBITOR OF ALUMINIUM IN 3 % SODIUM CHLORIDE SOLUTION N.Cikovi, K. Gali, S.Prejac and K.Berkovi Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia The effect of cysteine on the electrochemical and corrosion behaviour of aluminium in salt solution was investigated. For this purpose, model salt solutions containing sodium chloride (3 wt %) and sodium chloride with cysteine, at the concentrations from 10-1 to 10-5 % (1:1), were prepared. The system was chosen to perform the corrosion processes which could take place in canned fish products where cysteine is one of the amino-acids containing sulphur in a molecular structure. Electrochemical investigation was prepared using potentiostatic polarisation method. From the potentiostatic polarisation data, corrosion current (icorr), corrosion potential (Ecorr), and polarisation resistance (Rp) were calculated. The inhibition efficiency (n / %) of added cysteine was also calculated. Redox potential and pH of test solutions were also determined. EXPERIMENTAL Potentiostatic polarisation (Wenking LB 75 M - Potentiostat, and Voltage Scan Generator - Wenking VSG 83) data were obtained using the standard three - electrode system. The capacity of the polarisation cell used was 150 mL. Aluminium rod electrode (99.95 % purity) with an exposed area of 1 cm2 was used. The electrode was polished with emery paper and then washed in distilled water and degreased in ethyl alcohol (analytical grade) before use. The counter electrode was a 1.5 cm2 platinum sheet, and the reference electrode was a saturated calomel electrode. pH (EA 940 Orion Expandable Analyser, electrode model 91-02) and redox potential (rH, EA 940 Orion Expandable Analyser, electrode model 96-78) values were determined for all investigated test solutions. RESULTS AND DISCUSSION Using the obtained data (Table I) an attempt was made to find out which parameter (pH, rH, Rp, icorr., n) was correlated with the concentration of added cysteine. Excellent correlation exist between icorr. and Rp (R2 = 79.7%), as well as between icorr. and inhibition efficiency (R2 = 98.5%) of cysteine. Table I. Correlation coefficient (r) between physico-chemical and electrochemical values and the concentrations of added cysteine into sodium chloride solution.  Cys. % P A R A M E T E R Sphysicochemical  electrochemical pHrH icorr (A cm-2Ecorr. mV Rp W cm2 ( % 05.824.255.80-4857.50 x 10310-15.612.451.05-5101.90 x 10581.93 %10-24.310.591.07-5171.20 x 10581.6NaCl +10-35.612.711.25-5672.10 x 10578.410-45.519.441.35-5002.90 x 10576.710-54.414.151.01-5401.30 x 10582.3 (1:1) correlation coefficient (r) between:r (icorr. / Rp)0.8928357r (Cys.conc. / pH)-0.5423318r (Cys.conc. / rH)0.14029195r (icorr. / ()-0.9924622 The relationship between the corrosion current density and polarisation resistance vs. cysteine concentration addition into sodium chloride solutions (1:1) emphasises a polinomial function (Fig.1). From the obtained results, it is evident that cysteine is able to act as corrosion inhibitor for aluminium in sodium chloride solutions. This could be due to the fact that cysteine form weak complexes with various metal ions (1). Previous results also showed inhibition efficiency of cysteine on tinplate corrosion (2). At this point it will be of great interest to find out if this trend will continue at even higher concentration, taking into account that meat protein content is between 15 and 24 % (3) and probably will affect corrosion process in canned meat (fish) products. The ongoing experiments include methionine inhibition efficiency on aluminium corrosion in salt solution.  CONCLUSIONS From the obtained results, it is evident that cysteine is able to act as corrosion inhibitor for aluminium in sodium chloride solutions. The highest inhibition efficiency (82.3 %) was obtained for the cysteine concentration in NaCl (1:1) at concentration of 10-5 %. The lowest values were obtained for the cysteine concentration of 10-4 % (76.7 %) and 10-3 % (78.4 %). REFERENCE H.H.Uhlig and R.W.Revie: Corrosion and Corrosion Control, John Wiley and Sons, New York (1985) p.446. N.Cikovi and K.Gali, In: Chemical and Biological Sensors and Analytical Electrochemical Methods, (Eds) A.J.Ricco, M.A.Butler, P.Vanysek, G.Horvai and A.F. Silva, PV 97-19 (1997) pp. 458-466. N.A.Lange: Handbook of Chemisty, p.796, McGraw-Hill Book Company, New York (1967).  EMBED Excel.Sheet.8      : B / 0 _ b o T U t x &0jls ԺԺԳԺԩ jnCJ OJQJ CJ OJQJCJ H*OJQJ jmCJ OJQJCJ H*OJQJ CJ OJQJCJ H*OJQJOJQJ H*OJQJ5H*5 >*OJQJOJQJBhj. ` a b o p t u $2$22 $L7$$7$$7hj. ` a b o p t u v w x stuvwx}~  (0<FPfhjlv~ Uu v w x stuvwx}~0$$l423$``$dh$$2$2$2 7$$l$4<3 +& $ 1$$l443+$ $dh$ (0<FPfhjlv~̬+$$l4(3 +& $+$$l4(3 +& $$dh$bdpt .2np nswx\]_kqsDd1ef|}j9 UV 6OJQJ 5OJQJ H*OJQJ jUOJQJ jnCJ OJQJCJ H*OJQJCJ H*OJQJ CJ OJQJ<*4<HR\r|~+$$l4(3 +& $`-$$l:4(3 +& $$dh$*4<HR\r|~Dijz\^_kleM     u v >~Di̬T+$$l4(3 +& $ $dh$ijz\^_l||l$$2$2dh$$l43Y $dh$$dh$$$l43$_kle $ & F 2 $ & F2$$2$2 +0&P/ =!"# $%`!B1r˥=&Œ U( LWjBxwEƧjBˢ,QAA AD1q!FD )b@QSA ŀ)@,.D@, "}{>Hv? gDwݝ~˽wǴߖ?6o+ Mw\y={=VهJ t{vY+6W>񿚆k|&+犓*\ok=_^Þ\Rg>V#_NkJ#/J.z32i xX8]&vگnI+Pic3k_V^*|q*{?JU婭_jkrڛt:qQ*KįUTzMqqQjcմPU;w xUGWw1uPw1~UM~ …i|cxmNK^w @!^x4{4{ī%DD^S;9E<^w7q;!qg23Cr:;~Nduw:$3UGNuMvHK:#=!7~ jC]#3Ց&zuK }VvgVu\%V vޱ^Tt}7e|kk1wbN!vӜ8dIvdg" ?J8g競 "AdJN a׊0Zb%R͕#M!Fq"dUZ%^Ju|RԶ\uer5\&ϪN@]k T7!r56kt?>-^wi8# 22ɟj&''sB-TX(ٹW#ac2[}\Q@NQolHKe^+[8Q>ŪL*U)R Z1ʔj`QJ]NZ>Fr6ZY"kZnZF'o J2U 2%}V=Ek]gRY_$_Tr*N$as a|jz+LY>-2J ˅2A((›hr)Zf{-n/,R5-R42р) R T6F>%SeG( Z6FF(EV[{vJ8Ioݎx-nP퉬f7)gr,2e NDP mYJPJG(r 9TU1+j)jtH#iPkYp: NW3 ,ӅrZR?Bqh,N6Jŭײz8B(-E5ŒG$HJI_IuvZFZ; mrfvrՍB.gǍ>Biٷz-sVtP:E(@l&NvʝFxXTpXmiHHC]H=k~,W]$wG-2` f? OO _(f>.;` PA^hp$D v<[pXhP+F,U7x74aQ"8a4ʘedf7eʭgQ 7aSsw H~2}V-Jz-By 'z;N)# LZFCY&zP[a5J|Nr'㚝Up&SVZ|9B0sgu< g5բ7|—5YQWjEY)܀2"5Td!fYBAUq̐vXU (_N'Z,j[-GF-sX-kd>r2+]$t\K jYtZYXjid t6BեreCUEY'AXlRE89߀>BAej㮂}Vk,[M)[gڈ3x6jE٨VG(1{׶`tP&EFIm*vXmn]vmMqbjۢ6EVfvv=MɭaQ 7|^g;$?Y>5۔m svl(gעlW" p_PvjE١~Pp٫b [ eo:oUX(ޭ~?(Xŭ*ޫR~ʼnR*e*Mfڃ]"kHPAUbm(1n(UEُMIPr#FϪ:֢ڔ4*iF4_TEbU֢ڔ!+'+DU! >oPz鄮J*[[U('5q")]kip4'S bk? T3cRZW#^M5*Jej1dJb4n(inߨՈPbITFץ L/t-CI Sґ)@Geu}I1質cQH1VԀL2cQ*S*^[Y݈X5ҥT.N \ x݄*3E?Q}V-^8bOtS:3r>P SʉPNC nF'TPNZ@)UQK#Su}V֘*I-,q&y&Q-ANű|5*N@9T[Kt+/Mu l W]`bϧ554-kiQjPΧ`i 4@[eR[c[Rc} چ78%t}54jcQPZy;3B9l_y 2+ݤљNr;^;ٚWKm-^cq\JtnOafcC9D]vնtHP.ZC)gP`]_G-A:PZU( (,/7P+J+8k'5xb0t q8})Gd[z-z\BW;?y7YVgJ}+WA)SKj պ+]Er j \"N@.F@P:UjQ.'tKu *}\6J'0|*JNߤgjW =^q3* N؏A:ҁ".Qr;fAѭ u4[uw⪺[ (wu`w=v7A-Paʍwt'H7ʝ 608]uқH-ݢAy[ˤ qT_u ;ȷXw/!OŻ[`.~tJO0qJoC1z{ a S'`?P?3~ A08%ǞocHppz*gxUѦWaq<L07 T2J2^Fo4Q2^`(A)c (Ch~&;z1oEyMCH{W”7 (cO^˨g$7ޅ $TOqT~_NG~Fؓ+4ELS(*H`#C4MJAPц2*LXK/k4 e&bX2]&X{>C4Ɇ7 0o8evf o7 M5o8C'Q<=4P._́ SfPҗp~4P._̓ So6(oWByPB_- #E%ʄ 8%pz rQ~ ˅ &fB=VſJ>T#NR6*+Zr e-U!T'N@yVCRl@]* S (h%*ܨ?@*4PC)k}yXpz-PFq8qi;K]H0#Y`ijAF{Al({ e'TR,N@֟dR_(”i*YO .OPaqJvIO%B{ E?%}jQ~'Lzbe~WdbdV>oJ| cp4jyStBNpXc3:6Ϡy4*s fNr/= S*\UUp8,f[p*ߺR^|Z!,^ qϤꨩA|54m(@))]oOAm(sV0q,7/3@:PΈߍB) )kw ϊ/f 50fWM”FQ"5Zr*YPa^q]Jx+}80w 9:I皪[cj /NytVpq*,@UIPQPQAAAQA\ed%,@$ld%]m馕OHOЍqDAAED_Us/~~>ǓSsn>}nH]벷7V=}w JhnD->!V`+ +$wGA(+2TAG`'|A1!pPpHd=32g}Th47\2ܧAuНiR&b(%}(t6iR]>($n;8LGw}Q&J&]@flrgB.)~tߝ[S2MT$>t3R=S2\}˻,8_YjsQ'/U21irS\먛%U)ya%]2Z9^YҕR`}\Da%K21r3b[;*,JF+982[)W)#@2Z9nCqtQ,˅-C?|rpuDKJF]^VY'J+wu%:`x[*w :Nk!-UẐ/"Jdr]6X_!U(eޗR2Zs7[߸[ U*e c靖V2Z9n/X!Uʋ.6# +$[ [R-6ɈY2|n_uEkLط[}=Ne`M21s;:eR^Cg읊(%N;/+/ֿDaedr}}a}ʫ[YwW ݱw:L̻9_ک]hdF?|w]O`|ݒ=Ȼ>Gw>tD{=ѽƕPQ޸;OA({re\D'A7߹ aHr_AVH&}~L{Ō1 8#Շ$'[H;o+Itpʺ䯓jPw\2c{q9V~tBggZt .]($7G6tJ)_rQX9-~>EHrݱw)V.ߣϟ,.@: .j]D.읗ҮE|]- W_8#HmT빺2nmP}ۦ:ʫ(Yѽֱ/WWPHRu:drɽ3jhץF*m{VD/njQcۥ&+ cώ( $Zt5&j R j(4 Ϲ뮈T7 WnꦒZshmWK4f1Vnn6P) VJ hŦawWQ;H-sd"J+ļn|Z)]ثQH&].u}(>t^N2ZNR(j<>#wdU](.՝]uDz }-uV9Q7Dadtpe}c7(/^M2ZO]1unJy̾ػ&LU4B꥔.# +}$7d7(e0caD/0lT4G (\=H2: z^C#11kT|]*54sg@ Uxtedr- Gg vSiR&bA4QX-4Qx}#%BD $VF[㔒$CIL74( JL)sKT"I9>R%#BwݘE/vsʲQu:`ƈ"{\لrxQ2 ev\% sȷGVsAO݂ e*ȾY)Jdb>sAs1R%͇{"Jd4(WJ(ITjx1^Yu#եY}-B.MT9Tحh}+@쵈($)Z}[S%EJDAT(,ĻLh)PT)kE4rLe}mR -JBVVIF+i%Ѿ!RJ5fD$Z(쭑 _*R^2\To5TuKz _/]6mLth &ݾeR9 +Vn1W;i+e&Dmʭ kPM)PUnP+eF)" +HF+eL?|_%raϒs{ ST.~Ө/ڳy׷ћn}7vw!Qdt= oJys݈.h .oRʻm(*igw}Pv+e%" +{$L^iRcFAdreo#{a#L+>@O2ؤC}St׵T(Kǘ~:jGծbAtQ;,_;(_S ]t;.1CqO0/+(D$SL } 3|mwTʗ=L{:ewA<D'/$3PRΈrPNUN@9 ['l :iiDag1 Q[p.z/:H } fD?! +$tj?Rj9rs+%<y_bWJW@Y)W8RQXdw61uAr(AVjKF+Pm[+WJmG+-I2\]u'ܙ9=:Ssk+%{LWBi[3PUnpzQS(  ƈJCh ]R=ƨaT'`A4QzdzfŻ~&`5Az*xOE1ѽ?AcL1J"J<&:i*JiDʓ4JoWJ(S %!2SP2˻Q&JF+;dg$̈́4Q)3aJ(LVd(P5Y)̒h%xA& dDi4eTO7SyvFgRi>Gdއ7tg e@JVJQfIF+CR&o^2Em(֠ , YřQ:* T(9PQ2 %iuR4aA(̑ V>&DوO-KuQiTbB1깒\dj;:+oexZΥę@PRYQ+ ar PjPF|'ʠ) gǽ((\9ʝ|L7T|T܃sÚq OD(^2 % WH5(34ɖ;h Ej6M[S0]\kYӯ{ŬbTIO칑MΕ;+[k^9ӊ[?YDP)%+7vUn(%oksD2ܸJN-YLiP49d +ْJ)eCI:s_3sƜ9*<Feh` drx?C2~ RtofiՃIXX=0`Dq*q99<=MnjǩTFwtC%ɨ kP/9 ÛS2^J'7W:ը kANUғ+zz]2AuJ;;WڡQXBTpGtF%Μ^g;[ҕ2)zu{Չ4w=Q%5NG":VF/1W^TNW"*xjA_P1Uц+QinTZVZR!ђ+ QibT+53sTI^r)3~z|@M]yzfi>)z bau]w5.gr]נ+6)W3mQUQ+PiTVjթ,g*TÕ*tM<=MŒ_jQ"UܡTFz`:URTeQhTVF쥪'x*GUŒncuicuyct=ߛ4fR4w=MRLG)u1J'"z~qsT+{b*%0W>T%R*(¨5*+m^PBT)GV7;R3~e*J8(WP)dT GTXg.d%Sxu>RѫsҌ ND97h>Zu:LWvX"uE~RtfJ:@]TqB%˨|FWvHmit==$EWbƯ̥[3Wm;-ueQXATp=ofOIѫaFΠtA'bX-7z=T-J&W]Y2O-JUܡ5 Feq`e1UfQ'sg2Ǩ *>VӨ2+xIbƯWTI;R$hћfI4z2f 4@M33Jd( =2pLQyhj4UP27ʈ ; @eQXy\ P +ԏ=}՝D},Vj"V~Wh.^fAD*WQ`T:VܽB@QiXiK'ER5J;VJY}TYOwzT6큕mtRV:Ԫ~tzZKl_Y6Pe Uܱ+ˌʪ*dP!#oe*t<-$E`2U dgcx>ћffF :3cMj,Ufre,>ܑ׽^F_Dϯ3٢:PW:Й{EJ7UZQ[hT:V:P lJQiXiE*$]C'琢{15Ycu<}|lS*Q !k֩Ty*W$ѕrFR`USRnjJJJ) OEHѽbC`uc8X$pG#z^_Kg⎽Cݵ|\koC'3~eNTq~՟ܴc+wFuީR^j+W.BIѽkoX}X}!pFu-gyߢw蝉&uޥQ W+0W6cTGwëF`` UvS |iF5tR)zfDج؛R{wxDr+̵tW9L3ßI11W%TNw,klXIT*# o+CFoZDϛyNHѫa?UI3z[(:{c^W#z~m;JoT+tTgL'?w+I+TU:+YJkiXXX@3>kSG<g}*`e/YNqMk8(։XkQVB|Z&[Bk8JX){LCq5Ea%Gxk8zGzK&γ A"GJXeVV'q^\e%kP ?։?5x%nM#n4"Aq_>F4OB%}_/5轛_(=DBqvB{;>ȯg[5qN. '7:t:cseuc}}ıqr 9Y_8XB{Y;X[Y¬OL!r_N"hS5y5yS5gszy4)<dz9;O^uJ:Bm'YҬ&NVC,S=gUwykg:SUƩz©*s3Tg*<źש )itݶkkٵX3_AuYz,Y.h]nZcg} -_`ͷSͲSM_ԧnOD:>uv3kP9 u_bu-X/-Y-v+}vk}6A/j@OىJv[Vyݎ8TnT*lwdۯAN$B,~uҺmua݀@ntZ~z@[=Y'VkՋuoaX})[X[Vzh5@lh5Z-^c-YYiP:k64šM`MI0xMXh5\@X#֛۬0 ^FCYXֻP=VfXc ewՊxCIքoW&hW2n[2nd5&-4o5AkTŵ^i >nM5fޅF[3q´[p>f&CӠV kj=Ek5ʰX+Lk.h}nk>h}ncI贵3tZĺ]nXYw aRP{ +? T^z*e*=ղ3X2Vs5^ W kdMګX)(dثY{/)t^˺ 9VAa~ԍ{O?vj~gz@q4JZ{C g+Zy6Va$TElgC}^PSC3Ebk-:,v2{Xr/,Tj*XnKw".?ߏ.S}~Q/~"CGVS~_~neʗyGJЈ U@EW s(z|o{VO971st2<5l VQmjF^.FմėEPԗ!? *}e "EioCXP4iB9;4I㤅Zb;% #2 ֝v &ple{ixaqi&[.S 񒳸l; ̗c3ښe@~,3I6l?8G.I4NSp"Oj0v9b Rh*>b&qۢ!G Ф9Ru!lVٲ:9yLz;RW+>}KWTʆKبg* SՋ8e3}liCzXr| 2;dX/azsYv* %RFϫ R"NWDw]zoK(TP2O r$jʤ+nC Ve qKɪ7ùnEI$W2;@**SRpFJP)rTIl?{OIH>\yd-dI7YpY;/F#ב4sRF^9ÑPDZC:i#q35{U$tU.ľg(IכKjjElSc ARU-/ c8rV+} r4{mZlD^uk|?-H Ro %a1}]퀾cE|Q+5ve~f,{=ǞC;6e'Ӯ~. x&}W|WN _Uj/`~NnpD`K(?.P4h솛=e3LCDd?92#KK0  # A2B1r˥=&BD`!B1r˥=&Œ U( LWjBxwEƧjBˢ,QAA AD1q!FD )b@QSA ŀ)@,.D@, "}{>Hv? gDwݝ~˽wǴߖ?6o+ Mw\y={=VهJ t{vY+6W>񿚆k|&+犓*\ok=_^Þ\Rg>V#_NkJ#/J.z32i xX8]&vگnI+Pic3k_V^*|q*{?JU婭_jkrڛt:qQ*KįUTzMqqQjcմPU;w xUGWw1uPw1~UM~ …i|cxmNK^w @!^x4{4{ī%DD^S;9E<^w7q;!qg23Cr:;~Nduw:$3UGNuMvHK:#=!7~ jC]#3Ց&zuK }VvgVu\%V vޱ^Tt}7e|kk1wbN!vӜ8dIvdg" ?J8g競 "AdJN a׊0Zb%R͕#M!Fq"dUZ%^Ju|RԶ\uer5\&ϪN@]k T7!r56kt?>-^wi8# 22ɟj&''sB-TX(ٹW#ac2[}\Q@NQolHKe^+[8Q>ŪL*U)R Z1ʔj`QJ]NZ>Fr6ZY"kZnZF'o J2U 2%}V=Ek]gRY_$_Tr*N$as a|jz+LY>-2J ˅2A((›hr)Zf{-n/,R5-R42р) R T6F>%SeG( Z6FF(EV[{vJ8Ioݎx-nP퉬f7)gr,2e NDP mYJPJG(r 9TU1+j)jtH#iPkYp: NW3 ,ӅrZR?Bqh,N6Jŭײz8B(-E5ŒG$HJI_IuvZFZ; mrfvrՍB.gǍ>Biٷz-sVtP:E(@l&NvʝFxXTpXmiHHC]H=k~,W]$wG-2` f? OO _(f>.;` PA^hp$D v<[pXhP+F,U7x74aQ"8a4ʘedf7eʭgQ 7aSsw H~2}V-Jz-By 'z;N)# LZFCY&zP[a5J|Nr'㚝Up&SVZ|9B0sgu< g5բ7|—5YQWjEY)܀2"5Td!fYBAUq̐vXU (_N'Z,j[-GF-sX-kd>r2+]$t\K jYtZYXjid t6BեreCUEY'AXlRE89߀>BAej㮂}Vk,[M)[gڈ3x6jE٨VG(1{׶`tP&EFIm*vXmn]vmMqbjۢ6EVfvv=MɭaQ 7|^g;$?Y>5۔m svl(gעlW" p_PvjE١~Pp٫b [ eo:oUX(ޭ~?(Xŭ*ޫR~ʼnR*e*Mfڃ]"kHPAUbm(1n(UEُMIPr#FϪ:֢ڔ4*iF4_TEbU֢ڔ!+'+DU! >oPz鄮J*[[U('5q")]kip4'S bk? T3cRZW#^M5*Jej1dJb4n(inߨՈPbITFץ L/t-CI Sґ)@Geu}I1質cQH1VԀL2cQ*S*^[Y݈X5ҥT.N \ x݄*3E?Q}V-^8bOtS:3r>P SʉPNC nF'TPNZ@)UQK#Su}V֘*I-,q&y&Q-ANű|5*N@9T[Kt+/Mu l W]`bϧ554-kiQjPΧ`i 4@[eR[c[Rc} چ78%t}54jcQPZy;3B9l_y 2+ݤљNr;^;ٚWKm-^cq\JtnOafcC9D]vնtHP.ZC)gP`]_G-A:PZU( (,/7P+J+8k'5xb0t q8})Gd[z-z\BW;?y7YVgJ}+WA)SKj պ+]Er j \"N@.F@P:UjQ.'tKu *}\6J'0|*JNߤgjW =^q3* N؏A:ҁ".Qr;fAѭ u4[uw⪺[ (wu`w=v7A-Paʍwt'H7ʝ 608]uқH-ݢAy[ˤ qT_u ;ȷXw/!OŻ[`.~tJO0qJoC1z{ a S'`?P?3~ A08  !"#$%&'()*+,-./0123456789:;<=>@ABCDEFpILnNOPQRSTUVWXYZ[\]^_`abcdefghijklmqrstuvwxyz{|}~Root Entry  F`m'j`OݽKData ?LCWordDocument |ObjectPoolOݽ`Oݽ_957258242 FOݽ)OݽOle CompObjbObjInfo  " FMicrosoft Excel ChartBiff8Excel.Sheet.89qOh+'0@H\p  Kata Galic Kata GalicMicrosoft Excel@@UWorkbook MASummaryInformation( DocumentSummaryInformation81Tables IBa= = l@,88X1Arial1Arial1Arial1Arial1Symbol1Arial1Arial1Arial1.hTimes New Roman1.hTimes New Roman1.@Times New Roman1.hTimes New Roman1.@Times New Roman1hSymbol1.hTimes New Roman1.hTimes New Roman1.hTimes New Roman1.hTimes New Roman1.hTimes New Roman1.hTimes New Roman1.hTimes New Roman1hSymbol"Kn"\ #,##0;\-"Kn"\ #,##0#"Kn"\ #,##0;[Red]\-"Kn"\ #,##0$"Kn"\ #,##0.00;\-"Kn"\ #,##0.00)$"Kn"\ #,##0.00;[Red]\-"Kn"\ #,##0.00>*9_-"Kn"\ * #,##0_-;\-"Kn"\ * #,##0_-;_-"Kn"\ * "-"_-;_-@_-,)'_-* #,##0_-;\-* #,##0_-;_-* "-"_-;_-@_-F,A_-"Kn"\ * #,##0.00_-;\-"Kn"\ * #,##0.00_-;_-"Kn"\ * "-"??_-;_-@_-4+/_-* #,##0.00_-;\-* #,##0.00_-;_-* "-"??_-;_-@_-                + ) , *       #Chart1"Chart22Sheet1?Sheet2@Sheet3jb( 3  @@  Q0.1% Cys+3% NaCl0.01% Cys+3% NaCl0.001% Cys+3% NaCl0.0001% Cys+3% NaCl0.00001% Cys+3% NaClEcorr/mV icorr/mAcm2 Rp /ohm cm2 Al elektrodapHrH3% NaClCys :NaCl (1:1)n/% r/icorr/Cys%) r(icorr/Rp) r(Cys%/pH) r(Cys%/rH)r(icorr/iskor.)nicorr.Rp r(Cys%/iskor.) SP Ϙ 4qn0Hם0'l0Hם0Ϙ48Y`둂`둂`둂b"|b`둂$b $`둂$鑂& (b50sT0(bDb0sT0 $鑂40sT0(b( =0h㈵>eJ4Q?1AnQ?L@{GzT? A_vOV?@Ap>?P?@e   Pz3GddD$% M 3O&Q4$% M 3O&Q4FA%=U&3O%=U&3 b43*43" 444eee> Gd  IMHP LaserJet 4L@g ,,@MSUDOHP LaserJet 4L?\ad " d,,??3` 8"h` 8"h` 8"h` 8"h` 8"h` 8"hPz3Gdd 3Q: icorr.Q ;Q ;Q3_4E4 3Q:  Rp Q ;Q ;Q3_ M NM  !!d4E4 3QQQQ3_ O NM  MM<4JKC4 3QQQQ3_ O NM  MM<4JKC4D$% M 3O&Q4$% M 3O&Q4FA{#  3O  3*-#M43*{Gz#M4% M3O%Q 2% Cys in 3 % NaCl (1:1)'4% MZ3O+&PQ $icorr. / mA cm-2'4523  NM43d" 33O3y% M3O& Q423 M NM443_ M NM  MM<444A{#  3O3*! M43*4%  MZ3O+b&P  Q  Rp / W cm2'43d" 44% 'zd IM:3O 1+&P >Q >Fig.1. Rp and icorr. for the aluminium in Cys + NaCl solutions'4% y@Mz3OheF&P* #$6Q p6y (Rp)= -2E+15x4 + 2E+14x3 - 2E+12x2+ 2E+09x + 110169'4% I{@Mz3OF&P" 3Q j3y (icorr.)= 126.66x3 - 13.839x2 + 0.1162x + 0.0012'44e??{Gz?{Gz?MbP?MbP?-C6?-C6?h㈵>h㈵>eJ4Q?1AnQ?L@{GzT? A_vOV?@Ap>?P?@e> Gd I  dMbP?_*+%MHP LaserJet 4L@g ,,@MSUDOHP LaserJet 4L?\ad " d,,??U} }  } } T0bbbb     bbb8fT[b Al elektrodaCys :NaCl (1:1) Ecorr/mV icorr/mAcm2 Rp /ohm cm2 pH rH n/%0.1% Cys+3% NaCl$@J4Q?1A{@@@0.01% Cys+3% NaCl?@nQ?L@@`@@0.001% Cys+3% NaClMbP?*? A@ܓ@@0.0001% Cys+3% NaCl-C6?~ (_vOV?@Az@@@0.00001% Cys+3% NaClh㈵>~ p>?P?@@t@@3% NaCl w? r/icorr/Cys%)+\ȕٿ/CyeeA3  r(icorr/Rp)+ 3?eeA3   r(Cys%/pH)+ 0(Z eeA3   r(Cys%/rH)+ /? eeA3  r(icorr/iskor.)+ :O eeA3  r(Cys%/iskor.)+ )~ eeA3   icorr/mAcm2 Rp /ohm cm2~ $@J4Q?~ 1A~ ?nQ?~ L@MbP?? A-C6?_vOV?~ @Ah㈵>p>?P?~ @icorr.Rp  n~ $@J4Q?1A@~ ?nQ?L@@MbP?? A@-C6?_vOV?@A@h㈵>p>?P?@@8C Sgh_tuF_]\\a`PJ82<<K66.:PH 0(  >@ I  dMbP?_*+%"??U>@ I  dMbP?_*+%"??U>@ ՜.+,D՜.+,L PXd lt| PBFj Sheet1Sheet2Sheet3Chart1Chart2  WorksheetsCharts 6> _PID_GUIDAN{7AD805E0-EE5A-11D1-A14F-00E0290CC20C}%ǞocHppz*gxUѦWaq<L07 T2J2^Fo4Q2^`(A)c (Ch~&;z1oEyMCH{W”7 (cO^˨g$7ޅ $TOqT~_NG~Fؓ+4ELS(*H`#C4MJAPц2*LXK/k4 e&bX2]&X{>C4Ɇ7 0o8evf o7 M5o8C'Q<=4P._́ SfPҗp~4P._̓ So6(oWByPB_- #E%ʄ 8%pz rQ~ ˅ &fB=VſJ>T#NR6*+Zr e-U!T'N@yVCRl@]* S (h%*ܨ?@*4PC)k}yXpz-PFq8qi;K]H0#Y`ijAF{Al({ e'TR,N@֟dR_(”i*YO .OPaqJvIO%B{ E?%}jQ~'Lzbe~WdbdV>oJ| cp4jyStBNpXc3:6Ϡy4*s fNr/= S*\UUp8,f[p*ߺR^|Z!,^ qϤꨩA|54m(@))]oOAm(sV0q,7/3@:PΈߍB) )kw ϊ/f 50fWM”FQ"5Zr*YPa^q]Jx+}80w 9:I皪[cj /NytVpq*,@UIPQPQAAAQA\ed%,@$ld%]m馕OHOЍqDAAED_Us/~~>ǓSsn>}nH]벷7V=}w JhnD->!V`+ +$wGA(+2TAG`'|A1!pPpHd=32g}Th47\2ܧAuНiR&b(%}(t6iR]>($n;8LGw}Q&J&]@flrgB.)~tߝ[S2MT$>t3R=S2\}˻,8_YjsQ'/U21irS\먛%U)ya%]2Z9^YҕR`}\Da%K21r3b[;*,JF+982[)W)#@2Z9nCqtQ,˅-C?|rpuDKJF]^VY'J+wu%:`x[*w :Nk!-UẐ/"Jdr]6X_!U(eޗR2Zs7[߸[ U*e c靖V2Z9n/X!Uʋ.6# +$[ [R-6ɈY2|n_uEkLط[}=Ne`M21s;:eR^Cg읊(%N;/+/ֿDaedr}}a}ʫ[YwW ݱw:L̻9_ک]hdF?|w]O`|ݒ=Ȼ>Gw>tD{=ѽƕPQ޸;OA({re\D'A7߹ aHr_AVH&}~L{Ō1 8#Շ$'[H;o+Itpʺ䯓jPw\2c{q9V~tBggZt .]($7G6tJ)_rQX9-~>EHrݱw)V.ߣϟ,.@: .j]D.읗ҮE|]- W_8#HmT빺2nmP}ۦ:ʫ(Yѽֱ/WWPHRu:drɽ3jhץF*m{VD/njQcۥ&+ cώ( $Zt5&j R j(4 Ϲ뮈T7 WnꦒZshmWK4f1Vnn6P) VJ hŦawWQ;H-sd"J+ļn|Z)]ثQH&].u}(>t^N2ZNR(j<>#wdU](.՝]uDz }-uV9Q7Dadtpe}c7(/^M2ZO]1unJy̾ػ&LU4B꥔.# +}$7d7(e0caD/0lT4G (\=H2: z^C#11kT|]*54sg@ Uxtedr- Gg vSiR&bA4QX-4Qx}#%BD $VF[㔒$CIL74( JL)sKT"I9>R%#BwݘE/vsʲQu:`ƈ"{\لrxQ2 ev\% sȷGVsAO݂ e*ȾY)Jdb>sAs1R%͇{"Jd4(WJ(ITjx1^Yu#եY}-B.MT9Tحh}+@쵈($)Z}[S%EJDAT(,ĻLh)PT)kE4rLe}mR -JBVVIF+i%Ѿ!RJ5fD$Z(쭑 _*R^2\To5TuKz _/]6mLth &ݾeR9 +Vn1W;i+e&Dmʭ kPM)PUnP+eF)" +HF+eL?|_%raϒs{ ST.~Ө/ڳy׷ћn}7vw!Qdt= oJys݈.h .oRʻm(*igw}Pv+e%" +{$L^iRcFAdreo#{a#L+>@O2ؤC}St׵T(Kǘ~:jGծbAtQ;,_;(_S ]t;.1CqO0/+(D$SL } 3|mwTʗ=L{:ewA<D'/$3PRΈrPNUN@9 ['l :iiDag1 Q[p.z/:H } fD?! +$tj?Rj9rs+%<y_bWJW@Y)W8RQXdw61uAr(AVjKF+Pm[+WJmG+-I2\]u'ܙ9=:Ssk+%{LWBi[3PUnpzQS(  ƈJCh ]R=ƨaT'`A4QzdzfŻ~&`5Az*xOE1ѽ?AcL1J"J<&:i*JiDʓ4JoWJ(S %!2SP2˻Q&JF+;dg$̈́4Q)3aJ(LVd(P5Y)̒h%xA& dDi4eTO7SyvFgRi>Gdއ7tg e@JVJQfIF+CR&o^2Em(֠ , YřQ:* T(9PQ2 %iuR4aA(̑ V>&DوO-KuQiTbB1깒\dj;:+oexZΥę@PRYQ+ ar PjPF|'ʠ) gǽ((\9ʝ|L7T|T܃sÚq OD(^2 % WH5(34ɖ;h Ej6M[S0]\kYӯ{ŬbTIO칑MΕ;+[k^9ӊ[?YDP)%+7vUn(%oksD2ܸJN-YLiP49d +ْJ)eCI:s_3sƜ9*<Feh` drx?C2~ RtofiՃIXX=0`Dq*q99<=MnjǩTFwtC%ɨ kP/9 ÛS2^J'7W:ը kANUғ+zz]2AuJ;;WڡQXBTpGtF%Μ^g;[ҕ2)zu{Չ4w=Q%5NG":VF/1W^TNW"*xjA_P1Uц+QinTZVZR!ђ+ QibT+53sTI^r)3~z|@M]yzfi>)z bau]w5.gr]נ+6)W3mQUQ+PiTVjթ,g*TÕ*tM<=MŒ_jQ"UܡTFz`:URTeQhTVF쥪'x*GUŒncuicuyct=ߛ4fR4w=MRLG)u1J'"z~qsT+{b*%0W>T%R*(¨5*+m^PBT)GV7;R3~e*J8(WP)dT GTXg.d%Sxu>RѫsҌ ND97h>Zu:LWvX"uE~RtfJ:@]TqB%˨|FWvHmit==$EWbƯ̥[3Wm;-ueQXATp=ofOIѫaFΠtA'bX-7z=T-J&W]Y2O-JUܡ5 Feq`e1UfQ'sg2Ǩ *>VӨ2+xIbƯWTI;R$hћfI4z2f 4@M33Jd( =2pLQyhj4UP27ʈ ; @eQXy\ P +ԏ=}՝D},Vj"V~Wh.^fAD*WQ`T:VܽB@QiXiK'ER5J;VJY}TYOwzT6큕mtRV:Ԫ~tzZKl_Y6Pe Uܱ+ˌʪ*dP!#oe*t<-$E`2U dgcx>ћffF :3cMj,Ufre,>ܑ׽^F_Dϯ3٢:PW:Й{EJ7UZQ[hT:V:P lJQiXiE*$]C'琢{15Ycu<}|lS*Q !k֩Ty*W$ѕrFR`USRnjJJJ) OEHѽbC`uc8X$pG#z^_Kg⎽Cݵ|\koC'3~eNTq~՟ܴc+wFuީR^j+W.BIѽkoX}X}!pFu-gyߢw蝉&uޥQ W+0W6cTGwëF`` UvS |iF5tR)zfDج؛R{wxDr+̵tW9L3ßI11W%TNw,klXIT*# o+CFoZDϛyNHѫa?UI3z[(:{c^W#z~m;JoT+tTgL'?w+I+TU:+YJkiXXX@3>kSG<g}*`e/YNqMk8(։XkQVB|Z&[Bk8JX){LCq5Ea%Gxk8zGzK&γ A"GJXeVV'q^\e%kP ?։?5x%nM#n4"Aq_>F4OB%}_/5轛_(=DBqvB{;>ȯg[5qN. '7:t:cseuc}}ıqr 9Y_8XB{Y;X[Y¬OL!r_N"hS5y5yS5gszy4)<dz9;O^uJ:Bm'YҬ&NVC,S=gUwykg:SUƩz©*s3Tg*<źש )itݶkkٵX3_AuYz,Y.h]nZcg} -_`ͷSͲSM_ԧnOD:>uv3kP9 u_bu-X/-Y-v+}vk}6A/j@OىJv[Vyݎ8TnT*lwdۯAN$B,~uҺmua݀@ntZ~z@[=Y'VkՋuoaX})[X[Vzh5@lh5Z-^c-YYiP:k64šM`MI0xMXh5\@X#֛۬0 ^FCYXֻP=VfXc ewՊxCIքoW&hW2n[2nd5&-4o5AkTŵ^i >nM5fޅF[3q´[p>f&CӠV kj=Ek5ʰX+Lk.h}nk>h}ncI贵3tZĺ]nXYw aRP{ +? T^z*e*=ղ3X2Vs5^ W kdMګX)(dثY{/)t^˺ 9VAa~ԍ{O?vj~gz@q4JZ{C g+Zy6Va$TElgC}^PSC3Ebk-:,v2{Xr/,Tj*XnKw".?ߏ.S}~Q/~"CGVS~_~neʗyGJЈ U@EW s(z|o{VO971st2<5l VQmjF^.FմėEPԗ!? *}e "EioCXP4iB9;4I㤅Zb;% #2 ֝v &ple{ixaqi&[.S 񒳸l; ̗c3ښe@~,3I6l?8G.I4NSp"Oj0v9b Rh*>b&qۢ!G Ф9Ru!lVٲ:9yLz;RW+>}KWTʆKبg* SՋ8e3}liCzXr| 2;dX/azsYv* %RFϫ R"NWDw]zoK(TP2O r$jʤ+nC Ve qKɪ7ùnEI$W2;@**SRpFJP)rTIl?{OIH>\yd-dI7YpY;/F#ב4sRF^9ÑPDZC:i#q35{U$tU.ľg(IכKjjElSc ARU-/ c8rV+} r4{mZlD^uk|?-H Ro %a1}]퀾cE|Q+5ve~f,{=ǞC;6e'Ӯ~. x&}W|WN _Uj/`~NnpD`K(?.P4h솛=e3SummaryInformation( DocumentSummaryInformation8CompObj!jOh+'0(4D Xd    ZEFFECT OF CYSTEINE AND METHIONINE ON THE CORROSION OF TIN IN 3 % SODIUM CHLORIDE SOLUTIONNFFEUprava za informatiku MpraNormalz Kata Galicn42aMicrosoft Word 8.0k@t@ݽ@"j@$>ݽ4՜.+,D՜.+,@ hp|  "PBF j ZEFFECT OF CYSTEINE AND METHIONINE ON THE CORROSION OF TIN IN 3 % SODIUM CHLORIDE SOLUTION Title 6> _PID_GUIDAN{28D1B3E1-EE6E-11D1-A14F-00E0290CC20C}  FMicrosoft Word Document MSWordDocWord.Document.89q [4@4NormalCJOJQJkHmH @@@ Heading 1$$2@& 5OJQJ<A@<Default Paragraph Font@T@@ Block Text $L 5OJQJ:B@: Body Text $2 5OJQJLC@LBody Text Indent $7 5OJQJ:P@": Body Text 2$ 5OJQJ:u ~i_:?2$1r˥=&B-:2$`6d@mW2$h>X[ I0F#C@(  H  C A ? B S  ?hU!4T]chksx +JX  %p~PR,4[`fhE M r u   y ~ D L ` h (AI[_ \ekr'5=q ]at}OUxARbe ` m eqw}fqq Kata GalicC:\labos\CONGRESS\du98.doc Kata GalicC:\labos\CONGRESS\du98.doc Kata Galic-C:\WINDOWS\TEMP\AutoRecovery save of du98.asd Kata Galic-C:\WINDOWS\TEMP\AutoRecovery save of du98.asd Kata Galic-C:\WINDOWS\TEMP\AutoRecovery save of du98.asd Kata GalicC:\labos\CONGRESS\du98.doc Kata GalicC:\labos\CONGRESS\du98.doc Kata Galic-C:\WINDOWS\TEMP\AutoRecovery save of du98.asd Kata GalicC:\labos\CONGRESS\du98.doc Kata GalicC:\labos\CONGRESS\du98.docnSRd@. nSRnSRP5nSR5nSRnSRnSR(nSRnSRnSR8\5 @.5 @.`n@.`i@.4`i@.`d@.`d@.D`d@.@HP LaserJet 4LLPT1:HPPCL5MSHP LaserJet 4LHP LaserJet 4L@g ,,@MSUDOHP LaserJet 4L?\ad HP LaserJet 4L@g ,,@MSUDOHP LaserJet 4L?\ad v v 4v v Y{|  @@ @@@@@@ @@@(@@@8@GTimes New Roman5Symbol3& ArialWHRTimesTimes New Roman"Ah#%&[)[)*4 !20YEFFECT OF CYSTEINE AND METHIONINE ON THE CORROSION OF TIN IN 3 % SODIUM CHLORIDE SOLUTIONUprava za informatiku Kata Galic