echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Coatings News > Paints and Coatings Market > Common knowledge of coating: how to deal with several common problems in coating construction

    Common knowledge of coating: how to deal with several common problems in coating construction

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com
    Core tips: Information: 1

    Vertical flow: When the vertical surface is coated, the film flows downward and protrudes, so the coating effect is not good

    Causes: it may be too thick for one time or too high concentration of paint, too much air in the spray gun, too much paint, and the nozzle is too close to the coating

    Treatment method: dilute the viscosity, adjust the spray gun gas, the pressure is 3.5-4.5kg/m2, the pressure is appropriate and the output is appropriate, and the distance is appropriate (15cm-20cm)

    2

    Brush marks: After painting, the film is in the shape of strip

    Causes: during construction, viscosity is too high and wet film is applied again

    Treatment method: adjust the coating to the appropriate level Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd

    has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system

    It has undertaken a number of fire system installation projects, which has been praised by customers

    Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development

    We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: News: 1, vertical flow: in the vertical painting, the film downward flow, convex phenomenon, painting effect is not good

    Causes: it may be too thick for one time or too high concentration of paint, too much air in the spray gun, too much paint, and the nozzle is too close to the coating

    Treatment method: dilute the viscosity, adjust the spray gun gas, the pressure is 3.5-4.5kg/m2, the pressure is appropriate and the output is appropriate, and the distance is appropriate (15cm-20cm)

    2

    Brush mark: after brushing, the film is in the shape of strip

    Causes: during construction, viscosity is too high and wet film is applied again

    Treatment method: adjust the coating to proper viscosity, and when coating again, the bottom film shall be basically dry, and the brush force shall not be too large

    3

    Pinhole: after the film is dried, the coating surface presents a small hole shape, and the small hole is on the surface of the substrate

    Causes: the coating is too thick, the drying temperature is too high, the coating has moisture, dust paint, etc

    Treatment method: the thickness of one-time spraying shall not be too thick, and proper drying temperature shall be controlled to keep the coating free of dirt and dust

    4

    Dry spray phenomenon: when the coating is sprayed, the atomized coating has dried before the coating, and then forms a rough coating surface when it adheres

    Causes: the distance between the nozzle and the coated object is too far during spraying, and the air pressure of the spray gun is too high

    Treatment method: adjust the distance between the nozzle and the coating, about 15cm-20cm, and adjust the pressure to 3.5-4.5kg/m2

    5

    Albinism: the surface of the coating is pale and has no expected luster

    Causes: humidity is too high (more than 80%), diluent Han hair is too fast, and the coating is too cold

    Treatment: the coating humidity should be more than 80%, or 5-10% anti white water can be added, and the diluent that is too fast dry should be used, and the coating should not be too cold

    6

    Peeling off: the coating film falls off the surface of the coating

    Causes: the base materials are wax, oil, water, etc., which are not dried and then coated

    The base material is too smooth, the wall has been powdered or the poor soil is used, and the adhesion is not enough

    Treatment method: thoroughly remove the base material to ensure that there is no wax, oil, water and other sundries

    The old wall that has been powdered must be removed completely

    Use oil or water-based soil to level and dry completely before coating

    7

    Orange peel phenomenon: the coating is not smooth, like orange peel like concave convex coating

    Causes: the diluent evaporates too fast, the spraying pressure is not fixed or too high, the blowing distance is too far, the first spraying is too thick, and the bottom layer is not dry before coating

    Treatment method: use appropriate diluent, control the pressure of spray gun, the distance should be moderate, do not apply thick at one time, the bottom layer should be completely dry and then applied

    8

    Fading phenomenon: after several days of coating, the part of color will fade, and the color is uneven

    Causes: the newly added product is not completely dry, and the alkalinity is too heavy, resulting in color fading

    Treatment method: the new wall should be painted one month later, and the epoxy primer should be used for the bottom

    Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.
    Related Articles

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent Echemi's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.