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i <br /> APPEND1X A <br /> Definition of Terms <br /> Prntcctiwe Anode - A metallic. nsject designed to cxtirode in place of the object it is dcsignw to prorcct, <br /> CathiPLIic Prot Let ionE - A technique: Eu prev rit thu i�orrr iorl txf a metal snrfacv q inaking that surface the <br /> cathode of an clectro0cmical col. <br /> Cement, Portland Ceinent - A cement That contains oxides of calcium, aluminum, iron, and silicon made by <br /> heating a mixture of limesione and clay in a kiln and pulverizing the resaltaw clinker, ar, defined in <br /> ASTM C 1 M Portland cement is also comide red-a hydraulic cement,because it must be mixed with wafer <br /> ru form a cement-water paste with [lid ablilty to develop strength and harden, invert tinder vwalcr. <br /> Cenimlizer - A device that assists in centering; tubular maierols in a borehole. <br /> Con duct imm Spedfic - A measure of the. abil;ly of water to canduct electric current at 77 degro Fahrenheit. <br /> It is relawd to tbc� 1wal concentration of ium in Ow water. <br /> CurrosIonc - `rhu cleteri0ration of a niateria1. casually a metal, hucauise cif a reaction with its environment. <br /> DrlIIIng Fluid - A fluid (liquid car gas) used in drilling operations to rernove cuttings from a horch0lei to cican <br /> and cool the drilling bit., to reduce NeTion bLLwecn 41tt* drill Stem and the Nircholc: wall, and, in some <br /> cwes, to }prevent caving or sloughing or the borehole_ <br /> f1eckrolytei - A chernicaI submance or mixture, usually liquid,c:ontairiing ions I h a t migrate in an electric field. <br /> The term electrolyw rders w the sail or lklifid udjncent Its, and in conlael with n buried or submerged <br /> metallic structure iticludittg tltc m4)islurr. and olhcf chomiCatls conwincd ftrclti. <br /> Intcrferrrice] - 'fire. siI UULinrt that ZkflSWs WI1Cn ,i foreign sal 2*trlicture is aff=w in any mray by a €direct current <br /> ,WkiTru, <br /> ftectilterE - An electronic device that changes alternating current to direct current, <br /> 1 <br /> c 17t.finition fr(im National Associallon of Corrosion Engimers Standard RP-01-69 or RP-05-72. <br /> -71_ <br />