Concrete is inherently durable – nevertheless, deterioration occurs when subjected to weathering or aggressive environments. For many years, coatings have been applied for aesthetic purposes. In the water and wastewater environment concrete is protected primarily for structural purposes. The increasing use of steel reinforced concrete in modern day construction has led to a growing demand for concrete being structurally protected in all types of industry.
Revised in 2020! Cathodic protection (CP) coupons have been used since the 1930s by pioneers of the corrosion control industry, both in North America and in Europe. They have been shown to be a practical tool for determining the level of polarization of a structure and to confirm the IR drop in a potential measurement.
The purpose of this standard is to provide a method for evaluating the effectiveness of a CP system using coupons. It is intended for use by people who design and maintain CP systems for buried or submerged pipelines, underground storage tanks (USTs), on-grade storage tank bottoms, reinforcing steel in concrete, water storage tanks, and various other structures in buried or aqueous environments.
The body of the standard primarily addresses applications for coupons attached to buried pipelines. Appendixes cover the use of coupons for other applications, including USTs, aboveground storage tanks, internal surfaces of water tanks, and reinforced concrete structures.
This revision adds new appendixes on the use of coupons on cased pipelines and the use of coupons to measure alternating current interference data.
Presents guidelines for cathodic protection of reinforcing steel in concrete structures. The guidelines are limited to impressed current cathodic protection systems for new or existing atmospherically exposed reinforced concrete and are not intended for application to prestressed concrete. Criteria described include 100 mV polarization development/decay, statistical distribution analysis, and E-log I analysis.
This NACE standard presents guidelines for cathodic protection (CP) of reinforcing steel in buried or submerged concrete structures. These guidelines provide corrosion control personnel with information to control corrosion of conventional reinforcing steel in portland cement concrete structures through the application of CP. The guidelines presented in this standard are limited to CP systems for new or existing buried or submerged reinforced concrete elements.
Concrete surface preparation differs from surface preparation of steel, mostly due to the inherent properties of concrete.
Concrete is a non-uniform mixture of porous, permeable materials (cement, sand, stone, additives, water) with low tensile strength and often numerous cracks and defects. It will vary in properties, including moisture content, from site to site and within any site due to the batched nature of its production and installation.
Ranging from the basics of corrosion in reinforced concrete to using forensic science to determine concrete coatings failure, in this Standards and Best Practice for Surface Preparation and Coating Application of Concrete reference book, students and technicians learn problem solving via multiple case studies and technical artiles.