pre-treatment | (chemical or mechanical) cleaning and passivation of the substrate |
fluidizingbed | A container that has a fluidizing membrane at the bottom, through which the fluidizing air can flow into the container or powder |
edge structure | Accumulation of powder on the outer edges of the workpieces |
inter-coat adhesion | Adhesion between two coating layers in a multilayer structure |
transport adhesion | Adhesion of the powder to the substrate before curing |
purge air | Airusedtocleanthe electrode in flat spray nozzles and the baffle plate in baffle-plate nozzles |
separating agents | An agent used in the production of injection-molded parts to prevent sticking in the mold |
spray pre-treatment | Chemical pre-treatment in which the chemicals are applied byspraying |
dip pre-treatment | Chemical pre-treatment method in which the parts are immersed in a bath filled with chemicals |
color change | Clean ing of the entire coat ing plant to allow subsequent coating with a different color |
color standard | Color shade as standardized by institutions (ral, ncs, pantone, etc.) |
powder center | Component of the fresh-powder feeding system, which includes the powder/fluid container and the injectors |
over-curing | Curing of the workpiece in the furnace at an excessively high temperature or for an excessively long retention time |
welding point | Defect visible thro ugh the paint film due to welding of the substrate |
thermo-plastic | Deformable plastic or coating that becomes soft again at high temperatures |
adhesive strength | Describes the adherence of one material to another; during coating, the adhesion of the powder coating to the substrate адгезионная прочность; |
resistance to ground | Describes the measured resistance between the workpiece surface and the ground connection |
penetration behavior | Describes the penetration of the coating powder into inneredges, cavities and recesses duringthe coating process |
color deviation | Difference in shade between sample and component or between different components |
formation of droplets | Duringmelting, the powder coating runs of ft he edges of the workpiece in the form of droplets |
metallic pigments | Effect pigments added to the powder coating to achieve special surface characteristics: mica, chrome effects, etc. |
faraday cage | Electrostatic phenomenon that makes coating in cavities and inneredges difficult |
streaking | - Elongated irregularities in the coatingthickness or the effect appearance of metallic powder coatings
- Пробег по улице в обнаженном виде (своеобразная форма протеста против общеприня...
|
overs pray | Excess powder paintthat is sprayed but did not adhere to the workpiece during the coating process |
end filter | Fine filter for particles that were not separated by the cyclone |
needlesticks | Fine-pored impairment ofthe cured powder coating due to outgassing or overcharge effects |
hangers | Frame, rod or rail for suspension of the workpiecesto be processed |
adhesion water dryer | Furnace for drying of the workpieces after pre-treatment |
powder hose | Hose through which the powder-air mixture is transported from the injector to the coating pistol |
solvent resistance | - Imperviousness of the cured powder coating to changes caused by applied solvents
- The ability of thermal management products to resist swelling when exposed to organic solvents such ...
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susceptibility to scratches | Inability of the powder coating to withstand friction orscratches |
specks | Inclusion of visible, non-meltable dirt particles in the powder coating |
grain distribution/grain spectrum | Indicates the ratio between the sizes of the individual powdergrains |
cloud formation | Local cloud-i ike irregularities in the effect formation in metallic powder coatings |
coating thickness/density | Measurablethicknessofthe coating on the substrate |
gray film | Optically visible decomposition products or deposits onthe cured powder coating film, which can be wiped away |
color/shade | Perceived color due to incident light with different wavelengths |
duroplast | Plastic or coating that cannot be deformed again after cross-linking, even at high temperatures |
deaeration additive | Powder additive used to avoid blisters orsimilaron exhal at ing substrates |
powder puffs | Powder lumps on the coating layer, caused by deposits that have come loose from the spray nozzle spitting; |
tribolelectric charging | Powder particles are positively charged by friction on teflon (ptfe) |
oversize particles | Powder particles that are larger than the desired grain spectrum and are screened out |
residual powder | Powder residues from recycling, prolonged storage, etc. that are no longer usable forthe coating process |
powder circuit | Powder that is not deposited on the workpiece is collected and conveyed back into the powder container to be resprayed |
metallic effects | Powdercoatings with added metallic pigments |
downward trickling | Powdertrickles/falls in small quantities from the workpiece; no laminar detachment occurs |
sine wave pattern | Pre-configured movement of the coating pistols over the component in accordance with the conveyor speed, pistol spacingand stroke speed |
fine fraction | Proportion of fine powdergrains (<10um) in the powder coating |
oven graph | Recordingof the temperature curve in the furnace |
dw rinsing | Rinsing with demineralized water (conductivity max. 20 us/cm) during pre-treatment |
fresh water rinsing | Rinsingcycle with fresh tap waterto remove chemical residues during pre-treatment |
deburring | - Rounding of cut edges with a minimum radius of 2 mm
- Removing burrs, sharp edges, or fins from metal objects by filing, grinding, or rolling the work in a barrel with abrasives suspe...
снятие заусениц; удаление заусенцев; снятие облоя; галтование; |
oxide layer | Sealed corrosion layer on a metallic substrate |
blisters | Sealed elevation in the powder coating film caused by outgassing |
pre-anodizing | See anodizing anodizing; |
spitting | - See powder puffs
- Контрольное протыкание зондом тюков с мягким грузом при таможенном досмотре
powder puffs; |
etchingslurries | Slurries produced by the etching process |
lumps | Solid lumps of powder, which may be caused by pressure, temperature or vibration |
sweep balasting | Special, gentle blasting process for galvanized substrates |
buchholz hardness | Standardized test method for measuring surface hardness in accordance with din en iso 2815 |
high-voltage blowback | Star-shaped defects in the uncured powder coating due to a lack of grounding |
dosingair | Supplyairinthe injector for regulation andhomog-enization of the powder feeding in the powder hose; this is regulated automatically in plants with total air control |
conveyingair | Supplyairinthe injector that is used to regulate the powder quantity; in plants with total air control it is regulated automatically depend ing on the set powder quantity |
conveyor/conveyor chain | System that moves the component or the suspension trolley through the coatingsystem |
screen/screening machine | System used to sieve the powder coating; also possible with ultrasound |
glass transition point (tg) | Temperature range in which the powder begins to soften |
object temperature | Temperature that the component must reach in the furnace to ensure proper curing; the retention time starts when this temperature is reached |
fluidizing | The powder is brought into a "liquid/suspended" state by means of compressed air |
heatingrate | The time in which the workpiece is heated in the furnace from the ambienttemperaturetothe required object temperature |
material thickness | Thickness ofthe substrate to be coated |
filiform corrosion | Thread-like corrosion ofaluminum; especially prevalent on damaged areasofthe coated surface or cut edges in the presence of air with a high salt content нитевидная коррозия; |
powder feeding | Transport of the powder from the container to the pistol or from the recycling system back into the container |
reversal point | Turning point of automatic pistols duringtheupand down movement |
surface impairment | Visible defects inthe powder coating |
sanded area | Visible impairment of the paint film due to mechanical pre-treatment of the substrate, e.g. sanding |
picture frame effect | Visible surface deviation (gloss, flow, structure formation) around the edges of a component |
orange peel skin | Visible, wave-shaped interference pattern on the coated surface |