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Coating Protection
Published in Karan Sotoodeh, Coating Application for Piping, Valves and Actuators in Offshore Oil and Gas Industry, 2023
Coating system 6B is not applicable for actuators but could be used on some parts of valves and piping such as bolting (bolts and nuts). This type of coating is applied on components that are coated with HDG or zinc coating. HDG is a form of galvanization, a process of coating iron and steel with zinc. The process of galvanization is performed by immersing the metal in a bath of molten zinc. Figure 3.20 illustrates the process of galvanizing steel components in molten zinc.
Materials
Published in Ansel C. Ugural, Mechanical Engineering Design, 2022
The process of galvanization involves applying a protective metallic coating to the surface of another dissimilar metal to prevent rusting. A galvanic action may be created electrochemically. Combinations of metals, like steel and cast iron, are considered safe from galvanic action. On the other hand, combinations like aluminum and copper will experience severe corrosion in moist surroundings. Zinc coatings represent the common practice of galvanizing ferrous materials to prevent them against corrosion.
Materials
Published in Ansel C. Ugural, Youngjin Chung, Errol A. Ugural, Mechanical Engineering Design, 2020
Ansel C. Ugural, Youngjin Chung, Errol A. Ugural
The process of galvanization involves applying a protective metallic coating to the surface of another dissimilar metal to prevent rusting. A galvanic action may be created electrochemically. Combinations of metals, like steel and cast iron, are considered safe from galvanic action. On the other hand, combinations like aluminum and copper will experience severe corrosion in moist surroundings. Zinc coatings represent the common practice of galvanizing ferrous materials to prevent them against corrosion.
Identification of a novel strain of fungus Kalmusia italica from untouched marine soil and its heavy metal tolerance activity
Published in Bioremediation Journal, 2021
S. Sumathi, V. Priyanka, V. Krishnapriya, K. Suganya
Zinc is among the most common elements in the earth’s crust. Zinc can be present in dust, soil, and water and is found in all foods. Zinc is a gleaming bluish-white product. Metallic zinc has several industrial applications. Zinc is widely used for coating steel and iron and other metals to avoid rust and corrosion; this method is called galvanization (Gul and Nasreen 2018). Additionally, metallic zinc and other metals are mixed to form alloys such as brass and bronze. Zinc also can react with other elements, such as chlorine, oxygen, and sulfur, to form zinc compounds. Hazardous waste site zinc contaminants contain zinc chloride, zinc oxide, zinc sulfate, and zinc sulfide. The bulk of the zinc ores present in the world naturally are in the form of zinc sulfide. Zinc compositions are commonly used in industrial applications. Nickel is a metal, belonging to the periodic table group VIIIB. Nickel in its chemical properties resembles iron, cobalt, and copper. Nickel (Ni) is also used in stainless steel, metal alloys, currency, electroplating, and battery manufacturing. The most common skin sensitizer is nickel, which affects large proportions of women, men, and children. Nickel allergy is significantly more prevalent among girls and women compared to men and boys. Nickel penetration in various consumer products leads to nickel allergy and allergic contact dermatitis on exposed parts of the body, including the hands (Plum, Rink, and Haase 2010).