Month: June 2020

At Allegheny Surface Technology we meet standards set by the following to better satisfy the needs and expectations of our customers.

Electropolishing Specifications:

• ASTM B912 – Standard Specifications for Passivation of Stainless Steel Using Electropolishing
• ASME BPE – Bioprocessing Equipment

Passivation Specifications:

• ASTM A967 – Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
• ASTM A380 – Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
• QQ-P-35C – Federal Specification: Passivation Treatments for Corrosion-Resistant Steel (replaced by ASTM A967)
• ASTM B912 – Standard Specification for Passivation of Stainless Steel Using Electropolishing
• ASTM B600 – Standard Guide for Descaling and Cleaning Titanium and Titanium Alloy Surfaces

Have more questions? Feel free to contact one of our Standards specialists by calling (866) 266-9293, or Request a Quote right here on our website.

Stainless steel pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, rust or scale from stainless steel. It is commonly used to remove oxide layers from welding and heat-treating.  A solution containing strong acids, is used to remove the surface impurities. Metal pickling or chemical descaling is but one of several pretreatment steps available for preparing an article for further processing such as passivation or electropolishing, or to perform a superior cleaning operation on welded structures.

Key business benefits of stainless steel pickling are as follows: Uses chemical solutions consisting of nitric and hydrofluoric acids to remove the scale and underlying chromium depleted layers to restore the corrosion resistance of stainless steel. Mechanical removal of those imperfections may leave abrasive material or other particles embedded in the surface and in some applications, mechanical polishing may be impractical. Metal pickling is considered the preferred solution for the restoration of the corrosion resistance in stainless steel. Pickling will further create a uniform dull finish on the workpiece.

Have more questions? Feel free to contact one of our Pickling specialists by calling (866) 266-9293, or Request a Quote right here on our website.