Chemical etching or chemical milling can help reveal hidden abnormalities or defects such as cracks, laps or corrosion in a material or component. Our trusted experts have experience with different types of chemical etching, including aluminum cleaning etch, anodic etch, blue etch anodize (BEA), nital etch and pre-penetrants etch. We also offer the chemical etching of nickel parts (nickel etch) and materials to perform material segregation and defect inspection.
Chemical etching is a form of processing that uses acids, bases or other chemicals to remove layers of a material or clean unwanted substances from a part or test sample. We provide chemical etching as a standalone method and as preparation for a range of test types and inspection techniques.
Chemical Etching for Cost Efficiency
Identifying material imperfections before submitting the sample to nondestructive testing, mechanical testing, metallography, microscopy or other analytical techniques can help save time and cost for manufacturers.
Our experienced experts provide etching and other chemical processing services for a number of industries, including aerospace, defense, transportation and power generation. For more information about our chemical etching services or to request a quote, contact us today.
Our Chemical Etching Services
Aluminum Cleaning Etch
Aluminum etching is a nondestructive technique used to clean or inspect the material for grain size or surface defects. It is also considered a preparation method for pre-penetrant etch.
Anodic etch is only applicable to stainless steel and nickel-based materials. This nickel alloy inspection method is used to detect surface defects, grain structure, grain size and more.
Blue Etch Anodizing
Blue Etch Anodize is a nondestructive test that can reveal minimal surface defects in titanium materials. Titanium is commonly used in critical rotating components for both aerospace and power generation industries.
Macro etch (also known as chem etch, chemical etch and chemical dissolution) is useful for both cleaning and inspection. This method is applicable for nickel and titanium based alloys.
Nital etch, or surface temper etch is a nondestructive technique that helps determine if a part has been overheated during testing.
Pre-penetrant etch is a surface cleaning method used to remove smear material from sanding, grinding, buffing, milling, etc. This etching method can be performed as preparation for Fluorescent Penetrant Inspection (FPI).
Common etchants used
Nital (nitric acid and alcohol)
Standards we test to
ASTM A262 (Practices A, B, C, & E), ASTM E3, ASTM E340, ASTM E381, ASTM D3759, ASTM E407, ASTM E45, ASTM A561, ASTM A604, ASTM E646, ASTM A763
AMS 2642, AMS 2643
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