If the appearance of product workpiece of Hastelloy alloy adheres to oil during heating, the difference between the thickness and composition of oxide skin where the oil adheres and that of other one-sided oxide skin will also cause nitriding. The one-sided nitriding of metal materials of air oxidation subcutaneous tissue substrate will be anxiously eroded by acid. The droplets that need to be sprayed out when the fuel oil is first incinerated, if they adhere to the product workpiece, the harm is also very great. The fingerprint identification of the control personnel will also be harmful when adhering to the product workpiece.

Therefore, the operator does not need to touch the stainless steel plate with force immediately, and does not need to make the objects stained with new oil stains. It is essential to wear clean rubber gloves for control. If the appearance of the object is adhered with cleaning oil, it is necessary to fully deoil it in 3E vinyl chloride degreaser and anhydrous aluminum chloride aqueous solution, and then clean it with warm water, and then conduct heat treatment. If there is dirt on the surface of Hastelloy, especially when organic compounds or ash adhere to the workpiece, heating will certainly affect the oxide scale. The gas in the Hastelloy furnace is very different, and the difference of the gas in each part of the furnace and the oxide skin will also change, which is also the reason for the non-uniformity after pickling and passivation. Therefore, during heating, the gas at each position in the furnace must be similar. Therefore, it is also necessary to consider the gas circulation.

The structural and mechanical functions of Hastelloy are very prominent. It has the characteristics of high toughness and high wear resistance, so it has a certain degree of difficulty in the mechanical processing layer, and its strong strain force is very strong. When the deformation rate reaches 15%, it is about twice as large as the 18-8 stainless steel plate. Hastelloy also has a medium temperature sensitization zone, and its sensitization bias expands with the increase of deformation rate. When the temperature is high, Hastelloy alloy is easy to digest and absorb the non profitable elements, which makes its structural mechanical function and corrosion resistance reduced. Non reducing hydrochloric acid, acid liquor with many concentration values and hydrogen chloride gas with medium concentration values that are not aerated have extra corrosion resistance. In addition, it also has corrosion resistance to metal catalysts.

Therefore, Hastelloy B-2 alloy is usually used in various sour gasoline and chemical plant processes, such as steam distillation and extraction of sulfuric acid; The alkylation of ethylbenzene and the formation of glacial acetic acid by bottom pressure carbonyl are in the cost process. As we all know, Hastelloy B-2 aluminum alloy has excellent corrosion resistance in many revitalizing substances, and can resist the corrosion of sulfuric acid at all temperatures and concentrations under superheated steam.