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Because of material-sourced or external processes applied to the material, hydrogen atoms entering into the product and then forming a ductility loss are called hydrogen embrittlement. As a result of being exposed to a specific force, metals that have a 10.9 resistance class and upper resistances or the Rockwell hardness of 35 and above in particular, the regions, which have intense hydrogen, have a risk of cracking or breaking. This situation is called hydrogen embrittlement.
For the purpose of removing the hydrogen, whıch has been absorbed by the surfaces of the material after the coating, the annealing process is carried out in 2 hours, 4 hours, 8 hours and 12 hours in the 180°C-220°C temperature range according to the ASTM B-850 and ISO 4042 standards. The risk can be reduced by this method. This process is called eliminating hydrogen embrittlement, degassing or tempering.
Material-sourced, Environmental Hydrogen Embrittlement is a
⦁ Coming of Hydrogen from the corrosive or hydrogen-rich environment and external sources,
⦁ Stress corrosion cracking,
⦁ Cathodic hydrogen absorption.
Hydrogen Embrittlement due to Processes Applied to the Material
⦁ Electrocoating bath
⦁ Pickling
⦁ Hydrogen compression in steel manufacturing
Shotblasting is a surface cleaning process that extracts stainless steel and metal by cleaning the burr, dirt and corrosion on the surface of stainless steel or metal. It is performed by spraying micro-sized stainless steel shots in specific pressure to the surface of the material. It has the advantage of providing a porous structure with the surface in under paint applications in particular.
With rubber drum shotblasting, shotblasting is preferred for steel components, iron components, heat-treated components, casting components, forging components, aluminum components, pressed steel or brass components, springs, various mechanical and automotive components.
Technique;
⦁ Vulcan Chronital Stainless Steel Products
⦁ Product sizes of S-20 [0,09 - 0,30 (mm)] ve S-30 [0,14 - 0,50 (mm)]
It is the surface cleaning process by cleaning, then, rinsing and drying processes of the components moving by turning inside the drum by the pressure spray with alkali cleaners at close range by loading of surfaces stained by contaminants such as lubricant, dirt to a spiral drum by automatic vibration.
It is preferred in the surface cleaning before the coating process, phosphate taking processes before or after the heat treatment process, phosphate coating process of fasteners such as screw, nut, bolt and the cleaning of lubricated and machining materials coming out of automat or CNC counter.
Apart from increasing the corrosion resistance of industrial product groups, the coating is performed on stainless products to provide a decorative appearance. With the Nerinox coating, a black appearance can be received instead of a gray color.
At the same time, we can apply white and yellow zinc coatings, which can be performed on iron, to a stainless surface by our special processes.
While being produced in machining, stainless fasteners may be exposed to red rust unexpectedly following assembly due to iron filings covering their surface. To avoid this, by the zinc-nickel coating similar to the same appearance, both the appearance and resistance can be ensured.
Its Advantages;
⦁ It provides an adhesion surface for under paint, cataphoresis and organic coatings
⦁ Its capability of reducing the coefficient of friction with sealers and protective lubricant
⦁ It prolongs the material’s life against abrasion and wearing out
Technique;
⦁ Working temperature above 60°C
⦁ 15-40 g/m2 crystal phosphate layer
⦁ Use of the dipping method
⦁ Having an absorbing property
Ömerli Mah. Tuna Sok.. No:18/1 Arnavutköy - İstanbul Arnavutköy - Istanbul
Ömerli Mah. Tuna Sok.. No:18/1 Arnavutköy - İstanbul Arnavutköy - Istanbul