Here you will find the most common paint defects: Advice on paint defect; Blistering; Bleeding; Cracking; Faults in painting plastics - Cracking; Crinkling; Industrial fallout; Loss of adhesion; Flaking; Sinkage; Spotting caused by external influences; Pinholes; Loss of gloss; Aftercare of vehicle paintwork; Chalking; Clouding; Corrosion creepback; Cratering; Dust inclusions The extent of chalking will depend on paint formulation and surface exposure to weather. Although some degree of chalking is normal and can be a desirable way for a paint film to wear, excessive paint film erosion may result in heavy chalking. Then repaint with a recommended paint. Cause Precipitation of elements within the paint. A chalky dusting or powdering at the paint surface, often associated with old, weathered paint film. • As paint films age, they become harder and less flexible and so “Something has to give”. Both of these processes occur simultaneously and have an effect on all types of finishes. A paint defect is in many cases due to a number of causes. Flaking. If the chalking is not excessive, it may not require treatment. Application of topcoat before the undercoat has dried. The defects in a paint film which can be traced to rust forming under the paint are due mainly to insufficient preparation of the metal, including incomplete removal of millscale. A low degree of chalking is often beneficial to whites and off-whites, since it tends to rid the surface of a certain amount of dirt and mold. Paint Chalk run-down - [common condition] is caused by chalking paint which runs down and stains other wall areas or masonry or foundations below. Acid attack Bleaching Bleeding Blistering Blooming Blowing Blushing Chalking Cissing Clouding Clouding by runs Cobwebbing Contamination Corrosion Cracking Crazing Dirt Dry Spray Dull Finish Flaking Hands … The paint binders slowly degrade due to moisture which results into easing the hold of the binder on paint pigments. But serious cases are usually due to using the wrong product—either interior paint or low-quality exterior paint that contains a high degree of extenders (white, powdery paint additives). Prevention. Chalking is especially prevalent with flat paints and white or very light-colored paints that contain high levels of titanium dioxide and extenders. Regulate the use of putty and paint. The pigments in paint are naturally released when exposed to weather changes, so some chalking is to be expected over time. All unacceptable defects shall be repaired according to the procedures provided in the appropriate applications procedure. Chalking. In this type of defect, some portion of the paint film is not sticked properly with the surface; … Breakdowns are usually first of all seen as blistering or cratering and followed by … Because it can easily be given a distressed look, chalk paint is ideal for those who want to add character and vintage charm to their home. Blistering paint can be a real pain here in the hot and humid south. This may be due to: Incompatible or defective materials within the paint. Remedy. 2. Sagging is usually apparent on local areas of a vertical or curved surface. https://www.dunnedwards.com/howto/paint-problem-solver/chalking Degradation of pigment. Use recommended materials. Degradation of the binding agent. The defect is not common with the pigments available today. Causes and Prevention of Paint Failure Ponderosa Protective Coatings™ CAUSES AND PREVENTION OF PAINT EH FDWDVWURSKLF 6XFK IDLOXUHV DUH EOLVWHULQJ ÀDNLQJ FAILURE by Charles G. Munger Good Painting Practice, Steel Structures Paint Manual, Volume 1, Chapter 23 Coatings or paints are the principal materials of corrosion Apply several thin coats of a 2K surfacer to problem substrates and allow longer flash-off. Chalking is the powdery deposit on the surface of the paint which dulls the gloss and appears after exposure. Chipping. Add a moisture scavenger if required. 4.0 CORRECTIVE ACTIONS. Chalking. When sagging occurs over a long distance this is described as a curtain. Blistering and peeling are defects in which swelling of the paint film occurs. Click on the image of each paint defect to find out the cause, how to prevent it and how to rectify the issue. 1. This cosmetic defect is most noticeable on an un-painted masonry wall below a painted surface such as a window, or wood siding above a brick wall. Excessive chalking is detrimental because it can: Chalking occurs when ultraviolet rays cause the paint binder to disintegrate. The primary cause is exposure to sunlight. This defect is usually associated with long exposures to sunlight and is a natural degradation of the paint film. A decorative paint known for its matte, chalky appearance, chalk paint is a popular choice for giving furniture and home decor a rustic, vintage, or shabby-chic style. 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