Resumen

CALLISAYA T, M.  y  MAMANI V., N.. Sistema de protección catódica por corriente galvanica para tuberías transportadoras de gas natural, red primaria (diseño y cálculo de una estación experimental de observación). Rev. Tecnológica [online]. 2014, vol.10, n.16, pp. 23-28. ISSN 1729-7532.

To transport natural gas black steel pipes are used underground and one of the biggest problems that arises is suffering corrosion effect mainly iron from moisture and soil salinity. In the iron-carbon alloys (called common steels), the structure has different polycrystalline geometrically and energetically inhomogeneous, with areas that show trends and other spontaneous anode cathodic areas less reactive aggregates. Given the impossibility of accurately characterize hotspots. Methods are set corrosion protection of black steel which comprises applying sealants forged oils outside piping to transport non-polar and non-corrosive fluids. However, to ensure the lifetime of the pipes with respect to surface oxidation, a procedure is applicable electrochemical cathodic protection may be by galvanic current and impressed current. In this paper, we consider the galvanic current cathodic protection, basing its application and implementation methodology through an observation station for pipeline distribution primary of natural gas primary GN, following the regulations in force protection. Thus showing that this technological process reinforcement localized corrosion of black steel, includes the study of the electrical properties of soils in the study of galvanic cells for the calculation and design of systems and their practical implementation.

Palabras llave : Protection by galvanic cathodic current; galvanic cells; resistivity and conductivity for soils; black steel; sacrificial anode.