Cleaning Copper and Cobalt Stains

Q: We are an environmental services provider.  What do you recommend to remove copper and cobalt stains from pumps and flooring under a plating line?

A: To remove copper and cobalt stains from pumps and flooring with stainless steel and plastic surfaces, we would highly recommend Citranox® Liquid Acid Cleaner and Detergent, used at warm 1-2% solutions. Alconox Inc. Acidic detergents like this excel at removing inorganics.

If a washer or other application requiring a low foaming cleaner is needed,   Citrajet® Low-Foam Liquid Acid Cleaner/Rinse would be the choice. Same warm temp and 2% solution.

Both of these cleaners can remove other general residues as well.

Background Information:

Copper and cobalt stains are common issues in industrial settings, particularly in plating operations. These metallic stains can be persistent and challenging to remove due to their chemical properties. Copper often leaves bluish-green stains, while cobalt typically results in blue or pink discolorations. The accumulation of these stains not only affects the appearance of equipment and flooring but can also impact the overall cleanliness and efficiency of the plating line. Proper cleaning and maintenance are crucial to prevent long-term damage to surfaces and ensure optimal operation of the plating process. Using specialized acidic cleaners designed for industrial use is often the most effective approach to tackle these stubborn metallic stains while protecting the underlying surfaces.

Related Products

Citrajet is a low foaming, phosphate-free, concentrated, liquid cleaner and metal brightener for high peformance removal of metal oxides, scales, salts and inorganic residues in labware washers, parts washers, power-spray systems and manual and ultrasonic cleaning. Corrosion inhibited and free rinsing leaving no interfering residues. Ideal for acid washing and rinsing. Dilute 2:100 pH 2.5

Buy Now

Citranox is a phosphate free, concentrated cleaner and metal brightener for high performance removal of metal oxides, scale, salts and inorganic residues in manual and ultrasonic cleaning. Corrosion inhibited and free rinsing for reliable results and no interfering residues. Ideal for trace metal analysis. USDA authorized. Dilute 2:100. pH 2.5

Buy Now

Do you have a critical cleaning question for the experts at Alconox Inc.?  Search TechNotes to see if it’s been answered before or Ask Alconox.

To request any Alconox Inc. detergents for free, please complete the questionnaire at Get Sample. For more information about any one of our Alconox Inc. detergents, consult the technical bulletin for each product. Or click here to access each of our detergent’s Safety Data Sheets