Blisters is a common enamel defect, which is characterized by appearance of circular holes & bubbles in a cooled enameled surface.
May occur as a group, cluster or line of blisters.
Blisters are typically caused by gas evolution during firing, as a consequence of :
- Poor steel quality
- Scratches or damage on base steel
- Large welding seams
- Insufficient cleaning
- Over pickling
- Over blasting
- Impurities in enamel
- Too thick enamel film
- Too high viscous frits
- Contamination of furnace atmosphere
- Under firing
Stordy/Hauck gas burners of Ferro enameling furnaces are operated with cold combustion air and have therefore low NOx emissions.
These burners may run “forever” provided their setting are regularly checked and when applicable adjusted.
In case of any damage, we may provide all necessary spare parts for such burners.
See http://industrial-enameling.shop for more info.
Our technical services include conducting preshipment inspections for industrial enameling equipment.
Below an example of a batch type spray-degreaser, made of stainless steel, which we recently inspected.
The world is in anticipation of a fourth industrial revolution.
This revolution is driven by giant leaps in ICT innovation and promises to radically alter the face of industry in the coming decades.
Automated production systems using advanced robotics increasingly communicate with each other on detailed aspects of production, joining up hitherto fragmented manufacturing processes.
By linking all steps in the value chain, a world of possibilities opens for companies, old and new.
See https://smartindustry.nl/english/ for more info about this topic.
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 Italian Porcelain Enamel Institute (CISP) has just published edition 1/19 of SMALTO PORCELLANATO. Continue reading “SMALTO magazine edition 1/19”
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”
Received earlier today a new batch of “Porcelain (Vitreous) Enamels and Industrial Enamelling Processes” 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) .
The latest ISO 9001 version 2015 puts a lot of emphasizes on managing competences & risks. Continue reading “Managing competences acc. to ISO 9001”
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”