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During uncertain economic times like these, barge owners look to new economics and efficiencies to continue to grow business or their bottom line. One manufacturer examined barge restoration, reworked operations and applied progressive technologies to increase restoration speed and quality all while cutting costs.
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This paper will examine the formulation and performance of new, activated zinc epoxy primers compared to conventional zinc-rich epoxy primers. We will demonstrate comparable corrosion resistance at reduced zinc levels in the dried film (Level 3 ≥65%) and show that zinc metal levels can be reduced to as low as 31% by weight without compromising galvanic corrosion protection while improving adhesion and mechanical properties of the dry film.
Of the most severe operations in the oil and gas industry are operations under high pressure and high temperatures where pressures and temperatures exceed 1000 psi and 212°F (100°C). Such operations may contain a variety of chemical constituents such as CO2 and H2S gases, hydrocarbons, and water. To address corrosion issues, materials engineers look into either upgrading to expensive alloys or use protective coatings.
When a metal or metal alloy is immersed in an electrolyte made of a conducting material of sufficient oxidizing power, such as moist soil, it will corrode according to a well-defined electrochemical mechanism. dc corrosion is a result of dissolution of material due to oxidizing reactions, liberating electrons and forming positive ions transported into the electrolyte, leading to material loss. The current-potential relationship governing this electrochemical process termed polarization, is non-linear. This relationship is often represented by a polarization curve, which is typically, an experimentally determined function. There are a number of parameters that can contribute to the final characteristics of the polarization curve within a system ranging from material parameters (e.g. material, geometry) to environmental factors (e.g. composition of the electrolyte).