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The first written record of galvanizing describes how a French chemist named Melouin presented a method of coating iron by immersing it in molten zinc to the French Royal Academy in 1742. Sorel, another French chemist patented a process for coating iron with zinc after preparing it with 9% sulfuric acid followed by fluxing with ammonium chloride. Great Britain granted a patent for a similar process in 1837. By 1850, galvanizing had become a generally accepted practice for the protection of iron and steel with 10,000 tons of zinc per year used for the protection steel.
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The search for environmentally friendly and greener materials in the polymer field is further explored to decrease dependency toward petroleum-based products. Sucrose soyate, a complex molecule of sucrose and fatty acids of soybean oils, provide an alternative renewable material for petroleum-based coating resins in addition to the already existing choice of drying oils
The Bresle Patch method is common used in Marine and Industry coating fields, Most of users only verify the purr water conductivity and deduct it from final extract salt solution.
There are a number of petrochemical plants that experience equipment failure and production loss due to corrosion. Proper maintenance of their existing equipment greatly reduces a plant’s down time therefore allowing production to continue. For those facilities that do not have an existing maintenance-painting program, we have developed a beginners / non-technical program guide that is easy to understand and implement as it addresses many plant’s existing and future coating systems.
International standards, both ISO and ASTM, require that the attributes exhibited during an adhesion test are recorded as part of the results. What are these attributes, how should they be recorded and what value are they to the inspector and applicator in assessing the reason for failure? This paper looks at all these questions and asks should we be going further than we do in defining the mode of failure.
A review of cathodic disbondment test (CDT) methods from standard organizations such as ASTM, ISO, CSA, NF and AS is presented in this paper.