Abstract: The present invention provides a method and apparatus for instrumental analysis in remote locations. In one embodiment, the present invention provides a method of controlling cathodic protection being applied to a metal structure having a surface disposed in an electrolytic environment comprising electrically connecting a metal coupon to the surface of the metal structure, positioning the metal coupon at a predetermined position relative to the surface of the metal structure and within the electrolytic environment, applying a cathodic protection agent to the surface of the metal structure to effect cathodic protection of the surface of the metal structure, measuring a cathodic protection indication proximate to the metal coupon, comparing the cathodic protection indication with a predetermined value, and adjusting the cathodic protection agent being applied to the surface of the metal structure in response to the comparison.

Abstract: A cathodic protection system for corrosion protection of metallic structures in contact with aqueous solutions such as salt water and calcium chloride brine. The system employs anode chambers containing hydroxide anolytes segregated from the electrolyte containing chloride by an ion-exchange membrane. The anode and the structures to be protected are coupled to voltage and current sources impressing current at the immersed surfaces of metallic structures to maintain these surfaces close to an equipotential and covered with a bound layer of polarized hydroxide. The preferred embodiment is used in connection with stainless steel holding tanks and associated equipment used to circulate calcium chloride brine to freeze whole muscle turkeys. When the brine and the anolyte contact the membrane, a bi-ionic potential forms across the membrane that drives the counter-directed transport of ions through the membrane, thereby preventing the anodic production of Cl2.

Abstract: A method and composition for providing cathodic protection to underground steel structures is disclosed in which a composition comprising calcium hydroxide, calcium silicate and calcium nitrite is added to backfill for raising the backfill pH above 8 and an electrical current is applied to polarize the surface of the steel structure whereby the surface of the steel structure is maintained negative relative to the backfill. Magnesium hydroxide and aluminum hydroxide can be used as a substitute for at least a portion of the calcium hydroxide.