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If the iron concentration in an alkaline chelant boiler cleaning solution reaches a high value when dissolving magnetite, it sometimes continues to increase rapidly and not level, indicating corrosion of the boiler metal. A laboratory study of “runaway iron increases” investigated the cause and the best mitigation methods.
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Plastic packaging films can be readily impregnated with Vapor Phase Corrosion Inhibitors (VCIs) to provide corrosion protection, in addition to the basic physical barrier afforded by the plastic. VCI-containing plastic films are recyclable. This paper will discuss the benefits of using in-house recycling lines. Improved environmental profile. Better quality. Cost saving.
We have identified a class of inhibitory molecules that abrogate sulfidogenesis in oilfield produced fluids. Bottle tests and laboratory-scale bioreactors to mimic field conditions, found that very low doses of two versions of this class of compounds were found to effectively prevent H2S generation.
This paper suggests a new mechanism for explaining physics behind the localized corrosion attack based on experimental evidences. The effect of sand size and deposit type on localized corrosion attack in the presence of imidazoline type inhibitor is also experimentally investigated.
A method to test new surface preparation techniques for preparing existing offshore structures for maintenance painting has been developed. This paper will explain how the tests were conducted, how effective each method was at removing salts, and how the coatings performed in the ISO and NASA tests.
The effect of gas-liquid flow and inhibitor concentration on corrosion of carbon steel was evaluated by laboratory experiment.
Electrochemical measurements were obtained from steel-reinforced concrete samples immersed in 0.5 M H2SO4 medium, for simulating industrial/microbial environment, to assess the corrosion-inhibition effects of two admixtures.
In this work, a variety of polymers were evaluated as precipitation inhibitors for magnesium ammonium phosphate (struvite) in aqueous solution.
The paper describes results of potentiodynamic and potentiostatic electrochemical tests carried out in alkaline solution, in the presence of chlorides, on binary mixtures with nitrite, dimethylethanolamine (DMEA), glutamine and benzoate.
Control of corrosion in reinforced concrete structures including prevention protection and mitigation. Applicability considerations for the life cycle of the structure and use of proactive maintenance will also be presented.
A suitable acid package in matrix acidizing application is very important to the stimulation employed to improve the productivity of carbonate reservoirs. Typically, concentrated acids between 5 and 28 wt% are used and the most used mineral acid for carbonate acidizing treatment is hydrochloric acid (HCl) 1,2. A significant challenge of acidizing treatment is corrosion loss of metal tubulars due to the high reactivity of acid and metal, especially at high temperatures. Corrosion inhibitors are needed to reduce the corrosion loss of steel surface of facilities exposed in acidic environment.