{"product_id":"l51735-time-dependent-polarization-behavior-as-a-function-of-soil-type-1","title":"L51735 Time-Dependent Polarization Behavior as a Function of Soil Type","description":"\u003cp\u003eCathodic protection requirements for buried structures have traditionally been predicted by use of anode resistance equations which take into account the influence of anode geometry on the current distribution at the anode and the influence of soil resistivity on the driving force required to pass current to the structure to be protected. The conventional anode resistance formulas used for CP design were developed for bare pipes protected by remote anodes. Under these conditions, the current density at the anode is so much larger than that on the pipe that the current and potential distribution around the pipe can be ignored in resistance calculations. The current and potential distribution on the pipeline must, however, be considered for coated pipes with coating holidays or when anodes are placed in close proximity to the pipe.\u003c\/p\u003e\n\n\u003cp\u003eThe objectives of this work were: 1. to develop and apply new experimental techniques for identifying the time-dependent polarization behavior of pipeline grade steel as a function of the ionic composition of typical soil leachate and to develop and apply methods to interpret the results in terms of fundamental physical processes; 2. to measure the time-dependent polarization of FBE-coated coupons with and without machined coating holidays that expose bare steel; and 3. to establish an approach for predicting the polarization behavior of coated coupons with coating holidays that expose bare steel. by comparing the predictions for the polarization of coupons with holidays with experimental values.\u003c\/p\u003e","brand":"PRCI Store","offers":[{"title":"Default Title","offer_id":44367610478670,"sku":"15802","price":450.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/prci-store.myshopify.com\/products\/l51735-time-dependent-polarization-behavior-as-a-function-of-soil-type-1","provider":"PRCI Store","version":"1.0","type":"link"}