SEARCH RESULT

Flat steel products are coated with zinc to ensure decorative requirements and prevent the steel from corrosion. Galvanized cold rolled (GCR) sheets has three main characteristics for decorative requirements, these are metallic effect, spangle and gloss. High gloss value is one of effective parameter on the customer demand. In order to define influencing factors on gloss value, GCR sheet samples, with different dimensions and produced with different parameters, had been taken. Influencing factors such as zinc coating mass, sheet thickness, chemical composition of zinc coating, line speed were investigated under constant zinc pot metallurgy conditions. This study finds out increase in strip thickness and Al% content of zinc coating leads to increase in gloss value, increase in coating mass leads to decrease in gloss value and gloss-line speed data gives a Gaussian curve where the gloss value reaches a maximum magnitude at about 100 m/min.

International Iron & Steel Symposium
UDCS

Özgür KARAKAŞ Erdogan KANCA İbrahim GÖÇER Alper AKÜN Erkan PÜGE Güzin Müge LÜLE Ali DOĞAN Ahmet ÖZDEMİR

- Prepainted galvanized (PPG) steel coils, comparing to galvanized coils, have better corrosion resistance and fascinating decorative properties with their color alternatives and glossy appearance. Color of PPG coils, during service period, by the effect of environmental conditions, fades and their surface lose their glossy appearance. This study investigated the color and gloss stability of PPG steel sheet samples, painted with 14 different colors and 3 different paint type. 23 parallel samples were exposed to natural environmental conditions during 2 years at two different locations, Florida/USA and Dörtyol/Hatay/Turkey. For natural tests, environmental meteorological parameters such as temperature, humidity, rain and various weather conditions are recorded monthly. This study shows the effect of natural environment of Dörtyol/Hatay/Turkey location and the regions similar meteorological conditions like Dörtyol/Hatay/Turkey on color and gloss of PPG coils.

International Iron & Steel Symposium
UDCS

Özgür KARAKAŞ Tuğçe TUNÇBİLEK TOP Erdogan KANCA Hatice Arslan Hazar Çelik Fahri Akça Güzin Müge LÜLE

Red iron oxide which is produced by regeneration of waste hydrochloric acid from steel pickling line contains chloride. Chloride has negative effects on industrial productions which use red iron oxide as a raw material. This paper asserts red iron oxide particles have different chloride content according to their particle size. Regenerated red iron oxide was sampled from different production batches and these samples were grouped according to their particle size with sieving them from 1 mm to 75 µm. Sieved red iron oxide samples were analysed with spectrophotometer to determine chloride content. The study found out that chloride content slightly increased by increasing particle size up to 710 µm, after that size chloride content was drastically increased, such that, removing particles bigger than 1 mm from the iron oxide provides a 11,97 % reduction of the total chloride content and causes only 0,27 % loss from the total material.

International Iron & Steel Symposium
UDCS

Özgür KARAKAŞ Erdogan KANCA İbrahim GÖÇER Alper AKÜN Erkan PÜGE Güzin Müge LÜLE Tuğçe TUNÇBİLEK TOP