Submerged offshore platform joint protection

Claim 1

A method for protecting submerged steel joint sections of steel support members for offshore platforms comprising: a) prior to immersion placing concrete around the joint sections that will be submerged, said concrete containing pozzolan, the liquid component of the concrete containing up to 50 percent by weight of a polymeric latex and wherein the concrete is applied after cleaning the steel to a white finish, said application being from 0.25 to 1.00 inches thick and wherein the concrete extends from 1 to 2 support member diameters on either side of the covered joint, said concrete in addition containing polymeric reinforcement; b) allowing the concrete to set sufficiently to maintain adhesion to the support member; c) immersing the section having the concrete covered joints; and d) placing sufficient cathodic protection on the support member to inhibit corrosion in sections not covered by concrete.

Claim 2

A method for protecting submerged steel joint sections of steel support members for offshore platforms comprising: a) prior to immersion placing concrete around the joint sections that will be submerged, said concrete containing pozzolan, the liquid component of the concrete containing up to 50 percent by weight of a polymeric latex and wherein the concrete is applied after cleaning the steel to a white finish, said application being from 0.25 to 1.00 inches thick and wherein the concrete extends from 1 to 2 support member diameters on either side of the covered joint, said concrete in addition containing polymeric reinforcement; b) allowing the concrete to set sufficiently to maintain adhesion to the support member; c) immersing the section having the concrete covered joints; and d) placing sufficient cathodic protection on the support member to inhibit corrosion in sections not covered by concrete.