Abstract
A mathematical model of calcareous deposits on cathodically protected steel in seawater has been improved for practical applications. The model can be used in industry and as a pedagogical tool. The model extracts useful information from National Oceanographic Data Center data, and creates a list of geographical coordinates available for evaluation. The model requires as input geographical coordinates of interest and a service time. The model, using a finite difference method, then calculates surface coverage of calcareous deposits and current density requirements as a function of time and depth. Data are output in both matrix and column form for ease of evaluation. Surface plots of surface coverage, current, density, pH, and seawater component concentrations, as a function of time and depth are produced. The plots agree with experimental data and are well suited for observation purposes. These plots can also be used to explain variations in seawater component, concentration which occur with changes in depth and time at the specified geographical location. Ultimately, the data from this program can be used as input into a cathodic protection model, to determine location and number of sacrificial anodes required to protect the offshore structure.
Blackburne, Patricia Nicole (1996). Model of calcareous deposit formation on cathodically protected steel in seawater: improvements and extensions. Master's thesis, Texas A&M University. Available electronically from
https : / /hdl .handle .net /1969 .1 /ETD -TAMU -1996 -THESIS -B53.