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ii 08-18- 0 uu 2:11pm� aFrom-TAIT ENVIRO AL 7145606237 T-405 P.05/05 F-665 <br /> 2CROical rocc:;s which raked place ort <br /> 19cd to the structut'o fzom either <br /> Dthodic projection is the In"thod of�►�1 VLctsuch anatural <br /> Sal. Tl odd ectycuTrent app flow. •mac ainovr�t a current <br /> burled rt►otallic structaras i►ti a:� elect ysed to the electralyto and thO <br /> stcrirIcial anodes or paw�:rcd anedcs couotcracts pec natural corrasion cu ct�t <br /> quircd is dcTis:racicr�t prtm�irily on awe�rc ct�aaanict re s�facc arca ol"�ruxal compo <br /> composition of tlio elcc;trolytc toad Std <br /> dicative of the achievement of cathodic protert o on is 111 Ile sand steel <br /> Tho ,,c pted criteria in <br /> sioca'o tanks in�cordao'ca with Nt�C��ntcrnattonal 5tanclaxdtP®285 , <br /> MRS INTERNATIONALPTA:rfONAT.ASSOCXAT"ON OF CU 1�U nPOZ 5- s <br /> STANDA <br /> ColtROS1AN CONTROL Of UNDY-RCK0tTNU T1DRA�1E TANK SYST1�t�S <br /> .By <br /> CAxrjjo j-C PROTEMON <br /> sl,co <br /> ,,ODIC kROTLOT10N <br /> x . , <br /> . ,, <br /> 4,1 Criteria for.Steel$I00., .arc <br /> $, <br /> ft the <br /> a.1,1 <br /> Corrosic�at contiel can bo acldcv0d at vaciuus..lev 3 w demta sltaIc that adequate QliocliC <br /> CovironmeAtal cgnditioAr. Fiovuover, a►a.tlta.absetalowiM. , <br /> proleOion ltas he cn achicved,`0`10 or Tame o£cr�a foitowaiig ai►aiC al? y with the Cathodic <br /> 4.1 ],1 A negativ'® {cathodic) �pottria <br /> til:`of"at least 854 mV <br /> prateGti®t' applied. Tluss potential is rrieasurcd with r®sped to a saturated <br /> co er/copper:Sttkfale reference elcctrodq;. ere t .clectr lytetectrolytebounthe dary mustage be <br /> pl' <br /> drops other than those aq..oss iha'°sttucLure to <br /> considered for valid intazpreta4ion o�this voltage mea.",urement, <br /> •1,2 A negative p see definition in Section 1•�) of at least 8S0 <br /> 4.1 polarized )potential <br /> mV relative;to saturated copper 00*, :41'fatc reference electrode. <br /> x.1.1.3 A tninuriuni t�f 100 mll of cathn4crlt�poni�.ation. The form�ttton. or eGay <br /> of polars atiP.rt be used to satisfy tkus <br /> 4.2 Alternative Reftrencr �:leetwodeS Y <br /> ' be substituted for the satuated <br /> 4.2.1 Other standard 'reference electrodes Mayr their va]tage egtuivalents need to be <br /> Copper/copper sulfate rc.0req electrodes.JI.4w�eve. <br /> converted to the referenced equivakerats. <br />