The inspection and storage of coatings.

If all kinds of coatings are stored improperly, precipitation, dry knots, glue and so on will occur.
e.g. when the temperature of the water-based lactamine method is below 0 degrees C, it is easy to destroy the emulsification state and make it descenct and scrap, so it is necessary to understand the view of coatings, the identification and inspection of spoilage, and master the storage and storage methods of coatings.
All kinds of coatings, auxiliary materials normal appearance and inspection type normal appearance inspection method water-soluble paint no turbidity phenomenon, with sticky by hand, after stirring pigment suspension uniform, there is a normal slurry state such as abnormal odor, flocculation becomes murky, can be removed a little trial, directly Observation of its effect synthetic resin coating should be no hard blocks, no condensation, no separation after stirring in a uniform state, natural conditions can be dried, cured, no moldy state such as the appearance of clagulation, condensation, separation state, stirring can not be improved, can be removed a little trial, directly observe its effect accessories slip Stone powder: particles are finer, the color is not very white with fingers to study has a smooth delicate sense, wash with water is off the big white powder: particles than talcum powder thicker, color than talc powder white research also has a smooth delicate feeling, but not as smooth as talcum powder, water can wash off gypsum powder : the particles are thicker, some of the gray-white research feel particles, but the water can be made zinc white (zinc oxide, Lid powder, lead white): color white has a harsh feeling, particle fineness between the big white powder and gypsum powder when there is a fine, astringent feeling, With gasoline easy to wipe off the commonly used types of paint, thinner normal appearance and inspection of the normal appearance of the normal appearance of the inspection method varnish type clear and transparent, color is less, proper consistency, the lighter the color, the more transparent the better.
Wherein phenolic varnish for light yellow, brown to yellow brown, transparent oily liquid, alcoholic acid varnish for light red brown transparent oily liquid if there is turbidity, precipitation, thickening and other phenomena, indicating that the paint has become bad, can be removed a little trial, directly observe its effect.
can also be sampled into a clean and dry color tube, with different turbidity of the standard liquid compared paint type open cover surface without skin (allowing slight skin), only a thin layer of oil or thinner, thicker below, but once stirred can be fully mixed.
color conforms to the requirements, the viscosity is moderate, such as the discovery of precipitation, skin, thickening, thickening and other phenomena indicate changes.
after stirring the paint, with a stick to provoke paint observation, paint silk color character should be free to land without interruption, such as interruption of retracting shows that the paint quickly glued into raw paint milky white or gray-yellow viscous liquid, with a strong acid flavor with a wooden stick a little raw paint can be pulled into 10-12 cm long silk, after breaking the silk head quickly hooked up, raw on the paper is not easy to penetrate.
After painting the color from white to red, from red to purple, and finally into a bright, hard paint film thinner of good quality diluent should be water-white clear transparent liquid, no impurities, no suspension, no odor;
Can drop a little thinner on the filter paper, after a moment can check whether all volatile (with or without residual impurities);
Generally slightly cloudy, there is also a thickening phenomenon, serious for the white paste-like thinner improper selection or excessive dosage, room temperature is too low, relative humidity is too large, container closure is not strict, containing moisture, lead-type drying agent dosage too much slightly cloudy, can be added to the turbidity, ding Alcohol or benzene cyclic hydrocarbon solvent, heated to 60-65C with water insulation, room temperature controlled at 18-25C, relative humidity at 65% plus 5% thickening viscosity increased, thickened, in severe cases for frozen glue paint acidity is too high, with alkaline dyes Reaction, the finished product polymerization is excessive, the temperature is too hot, too cold, container leakage, leakage room temperature is maintained at 18 to 25C coating water heating, alcohol-acid amino paint can be added to the solvent 25% butanol color-changing varnish class: black red, red-brown paint class: color inconsequentate, gold Powder, silver powder blackened varnish category: solvent hydrolyzed and iron container reaction, paint contains acidic resin color paint class: pigment fade, metal pigment green, pigment precipitation using casks, porcelain, glass container filling: paint is best paint and pigment sub-packing,Now in use, varnish can be added to a little phosphate precipitation varnish class: the bottom layer is deposited with a variety of impurities or insoluble substances, the upper paint material intact color paint class: in general, sediment can be crushed, serious must be shredded varnish class: paint impurities or insoluble substances, lead drying agent in storage too cold or moisture, solvent use improper color paint class: paint density, particles too thick, Body pigment too much varnish class: filter to remove impurities color paint class: regularly repeatedly upside down, when used fully stirred, after the block re-grinding or used in the non-important parts of the container deformation container bulge, expansion heat, container temperature is too high, the paint becomes a lower aerosol temperature peel open paint barrel, there is thin skin on the surface, sometimes small particles or all gel phenomenon container closed not strict, paint surface and air contact with too much.
the storage time is too long before the use of the paint refiltered, paint with leftovers in the paint surface sprayed with a thinner dryer with part of zinc, calcium drying agent bloating liver: hard gel gel, thickening or forming a frozen rubber false thick: the appearance of thick oxides and acidic natural resin coating encounter, oil and oil polymerization excessive, latex water-soluble pigments, There are salty substances in pigments, too much drying agent, too many pigments in paint, especially The use of zinc oxide, zinc tantalum, carbon black and other pigments once liver can not be used, this kind of paint should not be stored for too long, by mechanical stirring to add a small amount of organic acid can return to normal, after stirring will be restored to its original condition, stop stirring is still false thick, but still You can use the storage and storage of coatings and safety protection material name storage method note note oily lacquer aleate paint polyurethane varnish oily varnish oily filler alcohol-soluble hydrogen putty asphalt on the shelf, should indicate the logo.
in order to avoid long storage time and go bad, the new material should be placed on the back lid should be tightened to prevent volatility and skin.
temperature can make the coating viscosity suitable.
under the heavy container to prevent handling difficulties.
cans of pigments, materials should be placed upside down regularly, in order to prevent precipitation emulsion coating emulsion varnish acrylic paint multicolored white dry pigment clam paste powder powder filler placed on the shelf, indicating the logo.
the new material is placed behind the first stored items, cannot be placed on a shelf by frozen small pieces, large pieces on the floor mat board, scattered material placed in a covered box to prevent freezing.
water-based coatings have a storage period, must be used up within the time limit should prevent moisture.
attention to the gypsum storage period, moisture-proof to prevent condensate alcohol-soluble paint dispassionate agent on the shelf temperature of more than 15C will cause expansion, resulting in sudden out of the container.
Prevents open flame paraffin phenol oil (1) from being placed in a switched iron bucket in a screwdriver on the stand (2) in a screwdriver with a 5-20 L, and placed in a low place to tighten the lid and place it in a seal separate from the main building Liquid gas compressed gas petroleum cellulose coating cellulose thinner chlorinated rubber thinner methylated alcohol polychloride diluent (1) placed on the outside should prevent contact with ice and snow and direct sunlight (2) special warehouse structure as follows: Wall: application Brick, stone, concrete or other fireproof material masonry roof: application of fragile materials to reduce explosive doors and windows: thickness of 50 mm, outward opening glass: thickness should not be less than 6 mm of wire glass floor: concrete floor, should be tilted, spilled solution should not be left Lighting switch under container: In order not to cause sparks, should be installed outdoors according to the most flammable liquid and liquefied petroleum gas use storage regulations storage Note: these regulations apply only to the storage of materials above 50L storage materials need to be approved by the relevant local inspection department statement: this number for reprint, sharing, Statements and opinions remain neutral for the purpose of industry exchange only, and copyright is owned by the original author.
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