Jilin Jiuzheng Industrial Equipment Manufacturing Co., Ltd

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    Maintenance Guide

    Phosphating

    Phosphating

    It is a process in which a chemical and electrochemical reaction forms a phosphate conversion coating. The phosphate conversion coating thus produced is referred to as a phosphating film. The primary purposes of phosphating are: providing protective coverage for the base metal, thereby preventing corrosion to some extent; serving as a primer before painting, enhancing the adhesion and corrosion resistance of the paint film; and acting as a friction-reducing lubricant in cold metalworking processes. Phosphating technology has been applied in industry for over 90 years and can broadly be divided into three periods: the period of laying the foundation for phosphating technology, the period of rapid development of phosphating technology, and the period of widespread application.
    (Blackening)

    (Blackening)

    Bluing of steel, also known as blackening, can be carried out either at high temperatures or at room temperature. High-temperature bluing involves immersing steel parts into a concentrated sodium hydroxide solution and subjecting them to bluing treatment at an elevated temperature of 100°C. The primary component of the bluing film is magnetic iron oxide (Fe3O4).
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