Identifying the correct type of enamel defect is the first & perhaps most important step when troubleshooting industrial enameling processes.
For this purpose we have invested in a digital microscoop and associated software.
Below some images of common enameling defects.
Ditmer Trading & Consulting BV developed together with Alpha Robotica & Franken Techniek two semi automatic flow coating machines for wet enameling the in- & outside of complex shaped heat exchangers.
Continue reading “Semi automatic flow coating machines for wet enameling complex objects”
Last week we assisted a customer in the United Kingdom with replacing all radiant tubes of their vitreous enameling furnace. Continue reading “Replacement of radiant tubes”
Flow-coating is a very efficient method, which is frequently used for applying wet enamels on e.g. cookware & water tanks. Continue reading “Flow-coating systems”
The consistent liquid enamel slip properties is a critical parameter at any automated wet application process.
Unfortunately enamel rheology is known to change easily under the influence of particle size, specific weight, temperature, milling additives and/or pretreatment chemicals.
Failure to maintain its properties within measurable tolerances, may result in inconsistent enamel layer thickness and eventually even enamel defects.
Do you really believe that you can “feel it” with your fingers as demonstrated on the picture below, or do you rather prefer a more precise testing method ?!
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.
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.
Continue reading “Fishscaling of porcelain/vitreous enamel coatings”
The annual German enamel congress was held in Maritim Hotel Würzburg from April 1 till 3, 2019.
Circa 100 stakeholders from the vitreous enameling industry in Germany, Austria, Switzerland, France, Belgium and The Netherlands participated in this event, which was well organized by the Deutscher Email Verband. Continue reading “German Enamel Congress 2019”
The Italian National Unification institute has published UNI 11734 as of December 6, 2018.
This standard specifies a method for measuring the hydrogen diffusion coefficient in order to determine the fish-scale susceptibility of steels, which can be used in the enamelling process. Continue reading “UNI 11734 : Determining fish-scale susceptibility of enameling steel”
The ORF made an interesting report about vitreous enameling of cookware at Riess Email in Ybbsitz, Austria.
Click here to view this video
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.