Cathodic protection design calculation

The cathodic protection system has been designed to protect the underground pipe. For materials and equipment, IEC code - shall be considered. However, as with all design efforts there are a wide number of factors that need to be considered for a sound design that meets generally accepted industry practices.

Design life is years. A critical part of design calculations for cathodic protection systems on existing structures is the amount of current required per square foot (called current density) to change the structure’s potential to -0.

CALCULATION METHODS OF CATHODIC PROTECTION SYSTEM PARAMETERS WITH VERTICAL ANODIE ZINC STRINGS. Analytical calculation in case of so called primary current distribution is shown in this paper. DESIGN AND CALCULATION OF Doc No.

Steps in designing sacrificial anode system. Establish soil resistivity. Determine current density requirement on the basis of soil resistivity and type of soil. Electrical continuity of structure.

Select requirement of electrical isolation.

The design life shall further take into account any period of time when the CP system will be active prior to operation of the protection object. Before dec iding which type, galvanic or impressed curre nt, cathodic protection system will be used and before the system is designe certain prelimi-nary data must be gathered. Physical dimensions of structure to be pro - tec ted. As well as detailed guidance on the anode design procedure the design guide also.

The weight criterion involves calculation of the weight of anode material needed to ensure a required level of current density for the life of the cathodic protection system. The designer is required to determine the desired life of the system and the utilization factors for the anode. To prevent this adverse galvanic action, cathodic protection should be employed.

The action of a cathodic protection system is to polarize the cathodic materials (high-strength alloys) to the corrosion potential of the aluminum hull plating, thereby eliminating the driving force for the galvanic attack. Description: This UFC provides general design guidance for cathodic protection (CP) systems. This UFC applies to all Army, Navy, and Air Force service elements and. To measure the potential of steel with and without impressed current cathodic protection and determine the effectiveness of impressed current cathodic protection design. Cathodic protection levels must be controlled so as not to damage coatings.

To determine the effect of coating and ICCP protection on corrosion behavior of carbon steel. Provide an ICCP system for the interior submerged surfaces of all fire protection water storage tanks, including bolted panel tanks. When the backfill beneath an on-grade tank is corrosive, provide an ICCP system for the exterior bottom of the on-grade tank.

This preliminary design will show the types of CP systems recommende the general concept of what the installation will look like and how it will work.

So effective was the system that the pre-vention of corrosion ofthecopper resulted in the loss of the copper ions required to act as a toxicide for marinegrowth,leadingtoincreasedmarinefoulingof the hull. Constants (k and k 2) for calculation of paint coating breakdown factors. STANDARD TECHNICAL SPECIFICATION FOR CATHODIC PROTECTION SYSTEM.

PE-TS-XXX-509-E0VOLUME II-B SECTION-D REVISION: DATE: 01. The requirements given in enclosed drawings, documents and Data Sheet A form part of this specification and shall be fully complied with.