Fishscaling of porcelain/vitreous enamel coatings

Fishscaling

Fishscaling is an enameling defect, which is characterized by small enamel particles chipping off.

Chipping off may happen directly after firing when cooling down or sometimes even days later.

example of enamel defect called fishscaling

Effected products may usually not be repaired. Due to this reason, this defect is still one of the most described topics within the international enameling industry.
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Classic reference book about vitreous enameling

Received earlier today a new batch of “Porcelain (Vitreous) Enamels and Industrial Enamelling Processes” book.

enamel reference book

This classic reference book, which describes in detail many aspects of vitreous enameling technology & equipment is a must for every professional enamelist.

Please note that the current edition is nearly sold out !

This excellent book and other literature about vitreous enameling technology, may be found at our webshop (https://dtc-webshop.com) .

Buy book

Thermal imaging of enameling furnaces

The performance of industrial enameling furnaces may gradually decline over time.

This may result in higher energy consumption (read increased enameling cost) and reduced quality of the coated surface.

In extreme cases the enameling furnace may even unexpectedly break down, because insulation has been damaged and/or worn out.

Therefore we suggest regular inspections & thermal imaging to identify major heat bridges and other spots with possible insulation issues.

Thermal imaging of industrial enameling furnace roof at hotzone near 180 degree turn
Thermal imaging of industrial enameling furnace roof
Thermograph inspection of enameling furnace door
Heat bridges at clean out door

European Energy Efficiency Directive

The European Energy Efficiency Directive (2012/27/EU), also known as the EED, was established in 2012.

The aim of this Directive is to help to realise the European target set in 2007 to reduce European energy consumption by 20% by 2020.

This should contribute to a reduction in greenhouse gas and air pollutants, to a decrease of energy costs, and to lower dependence on import of fossil fuel.
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Ultrasonic thickness measurement

With ultrasonic thickness measurement, you may detect the thickness of individual layers within a multi layer coating.

This may be of great help, when troubleshooting e.g. a two coats / one fire vitreous enameling process.

See our webshop for more details about this and other film thickness gauges.

ultrasonic thickness gauge
ultrasonic thickness gauge

 

Automatic enameling plant for water heaters

Depending upon the annual production volume, it might be interesting to reduce labor cost by integrating all equipment of an enameling plant for water heaters and/or solar boilers.

Such integration may be done with traditional monorail conveyors in combination with automatic transfer devices, like on the picture below.

Automatic transfer unit for large boilers
Automatic transfer unit for large boilers

Alternatively a so-called power & free conveyor system may be used.

This conveyor type consist of two conveyor tracks above each other.

Example of power and free conveyor

On the lower level free cars may run, while via the power chain at the upper level the free cars may be (dis)connected and transported.

Nowadays there are P+F systems, which thanks to a very special transfer system even include the transport of products within the enameling furnace.

Furnace with Power & Free conveyor
Enameling furnace with Power & Free conveyor

DTC may assist with the evaluation, which solution is most suitable for your vitreous enameling project.