For many years, the HELIOS II instrument has been able to identify the suitability of a steel to the enamelling process in order to avoid fish-scale defect. The aim of this work is to clarify the effect of sheet thickness of each steel grade (low carbon steels, IF Titanium steels, Boron steels) and to evaluate a test to correlate the hydrogen partial pressure, which causes the defect, with enamel quality. This kind of test consists of a forced fish-scale by electrochemical test on an enamelled sample coated on one side. The effect of sheet steel thickness is analysed using mathematical and statistical methods. Furthermore, the present work shows that the forced fish-scale using HELIOS II Instrument, by electrochemical test on a one side enamelled sample, improves the enamelling process quality (enamel thickness, chemical composition both of enamel and of steels…).
The HELIOS Approach to the Fishscale Defect: The Forced Fishscale Test and the Effect of Steel Thickness
M. BARSANTI;R. ISHAK;R. VALENTINI;
2018-01-01
Abstract
For many years, the HELIOS II instrument has been able to identify the suitability of a steel to the enamelling process in order to avoid fish-scale defect. The aim of this work is to clarify the effect of sheet thickness of each steel grade (low carbon steels, IF Titanium steels, Boron steels) and to evaluate a test to correlate the hydrogen partial pressure, which causes the defect, with enamel quality. This kind of test consists of a forced fish-scale by electrochemical test on an enamelled sample coated on one side. The effect of sheet steel thickness is analysed using mathematical and statistical methods. Furthermore, the present work shows that the forced fish-scale using HELIOS II Instrument, by electrochemical test on a one side enamelled sample, improves the enamelling process quality (enamel thickness, chemical composition both of enamel and of steels…).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
