Automotive Paint Inspection – Paint Meters

Quick shopping for choices at auto auctions require an correct evaluation of paintwork high quality to find out a car’s worth.
DeFelsko manufactures hand-held, non-destructive coating thickness gages that are perfect for use by physique retailers, dealerships, painters, appraisers, inspectors, detailers, and professional automobile patrons at auctions. They permit a fast evaluation of the standard of the paint end and to confirm that the situation of a car matches its reported historical past, that’s, decide if the car has been in an accident or skilled different varieties of paint harm.

Yearly, thousands and thousands of used vehicles are bought at varied public sale places all through North America. A person public sale location will usually promote greater than a thousand vehicles a day. Patrons have restricted time to find out true worth previous to the car coming onto the block. Along with quite a few different inspection factors, they should assess the standard of the paint end and confirm that the situation of the car matches its reported historical past. Critically they need to decide if the car has been in an accident or skilled different varieties of paint harm.

Traditionally, patrons and inspectors relied solely on visible inspections equivalent to checking physique panel alignment and in search of gaps that may point out bodywork or panel alternative. They regarded for indicators of repainting equivalent to paint overspray on seals and physique openings in addition to variations in paint shade and end all through the car.

Delicate modifications in shade, texture or gloss usually go undetected except the customer invests important time to view the car at completely different angles and beneath completely different lighting circumstances. Visible inspection methods are significantly limiting in dimly lit areas, in unhealthy climate (rain, sleet or snow), or on soiled automobiles.

In recent times, patrons have begun to rely more and more upon digital paint thickness meters to precisely assess paintwork high quality. Not like visible inspections, these devices present dependable and quantifiable measurement outcomes.

At first, environment friendly and inexpensive paint inspection strategies have been restricted to utilizing magnets or inaccurate magnetic pull-off testers. In addition to having limitations in accuracy and backbone, the most important disadvantage of many such magnetic devices is their incapability to find out paint thickness on something apart from metal. Fashionable automotive development strategies now embrace supplies equivalent to aluminum, fiberglass and plastic.

Manufacturing Supplies
Historically, metal was used solely to fabricate car exteriors as a result of it balanced price with power and machinability. Now aluminum is used for some parts as producers search for methods to scale back weight with out sacrificing security. Each these metals require portray for corrosion safety and beauty attraction.

Bumpers and fascia techniques are generally fabricated from plastic and composite supplies. Light-weight, they permit designers the liberty to create progressive ideas. Whereas metallic panels are simply dented by minor impacts, plastic physique panels are extra resistant to break.

On some lately manufactured vehicles and vehicles it isn’t unusual to search out all three supplies – doorways and fenders fabricated from metal, roofs and hoods fabricated from aluminum, and bumpers and mirrors fabricated from plastic.

Improved collision restore high quality has made it tougher to identify value-decreasing harm. As giant numbers of low-mileage automobiles come off lease and are being cycled by means of business and authorities fleets, inspectors and patrons depend on current developments in thickness measurement know-how to assist decide car worth.

Older Strategies
Till lately, shoppers requiring an environment friendly and inexpensive means to examine automotive paint thickness have primarily been restricted to measurement options equivalent to magnets, pen pull-off testers, and some primary digital devices. Sadly most of those options have excessive limitations in accuracy, decision and in some cases present no quantitative outcomes (i.e. solely purple, yellow or inexperienced lights).

The biggest disadvantage of many such magnetic devices is their incapability to detect paint thickness on aluminum. Even on metal some magnetic devices could be simply fooled by the addition of metal particles to the filler. When in search of minor paint thickness inconsistencies between panels (representing potential repainting), info supplied by an instrument with solely a zero.5 mil (13 um) decision and 1 mil (25 um) accuracy is extraordinarily restricted.

Present Strategies

DeFelsko manufactures the PosiTest DFT, a hand-held, non-destructive paint meter that’s very best for measuring the thickness of automotive paint meter on aluminum or metal automotive panels. The PosiTest DFT-F Ferrous is able to measuring as much as 40 mils of paint on metal panels, the place because the PosiTest DFT-C Combo is obtainable for measuring on each metal and aluminum panels. With three% accuracy and a zero.1 mil (2 um) decision, both PosiTest DFT meter is able to assembly the necessities of most paint measurement purposes.

Instead, the PosiTector 6000 sequence of meters present comparable measurement capabilities with increased accuracy and backbone. Extra options equivalent to reminiscence and print functionality are additionally helpful to clients with a need to log measurement outcomes.

Based mostly on the meant software, personalized meters and probes can be found which are particularly designed for measuring on metal, aluminum or each substrates.

Three Measurement Ideas
Paint thickness over exterior automotive supplies is finest measured with hand-held, digital devices. Three varieties can be found and choice relies upon upon the kind of coating, the fabric being painted, and the dimensions and form of the half. These devices use magnetic, eddy present, or ultrasonic measuring methods.

Magnetic Precept for Metal

Since metal is magnetic, paint thickness over metal is measured with magnetic (ferrous) gages using mechanical or digital operation.

Mechanical gages use a everlasting magnet, a calibrated spring, and a graduated scale. By measuring the drive required to tug the magnet off the coated floor, a thickness measurement could be decided. Low price magnetic pull-off gages present coarse measurements helpful for detecting bondo or different fillers beneath the paint. Their use by detailers is restricted. Accuracy is usually +5% with costs round $350. Product particulars can be found right here.

Digital magnetic gages are far more widespread within the detailing trade. They use a relentless strain probe to offer constant readings that aren’t influenced by completely different operators. Readings are proven on a liquid crystal show (LCD). Whereas most have primary operation, some have choices to retailer measurement outcomes, carry out instantaneous evaluation of readings, and output outcomes to a printer or pc for additional examination. Accuracy is usually between +1 to three% with costs ranging between U.S.$300 and $1,000.

Leave a Reply

Your email address will not be published. Required fields are marked *