Experts

Corrosion

Brian Dalder, engineering consultant, Eli Lilly

Brian Dalder is an engineering consultant at Eli Lilly and Company, Lafayette, Indiana and a registered professional engineer. He has almost 28 years of experience with the company, covering many aspects of bulk chemical manufacturing, including process automation, process development and scale-up, and process engineering. He now is the material selection and corrosion expert for the firm and heads its Materials Compatibility Lab. He has developed several internal material awareness and material training courses and currently teaches these several times each year.

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Hydrofluoric acid corroding glass site glasses
Small amounts of hydrofluoric acid (HF) in a moist organic process system are corroding the glass site glasses in the process piping, especially at the vapor-liquid interface. Initially the glass etches over so you cannot see through them; finally the glass is completely penetrated.Is there a sight glass material available that will beter tolerate this process stream?
Category: Corrosion

Protective Coating
What is the best protective coating to prevent corrosion on carbon steel? Also, there is some amount of water that sits on this CS plate which expidites corossion formation?
Category: Corrosion

Corrosive liquid and materials
Are there chemical plants that utilize and circulate solutions of chlorine, and if so, what are the preferred materials used for piping and pumping components? Is stainless steel, bronze or cast iron preferred for these chlorine solution processes?
Category: Corrosion

Corrosion of metals in saltwater
I have buried pipelines that are surrounded with water with a salinity of about 52,000 ppm. For these pipes, I was advised to use Duplex SS, SS 316 L, SS 310 or nickel chrome, but I still cannot obtain any document stating the exact salinity the materials can withstand and under what conditions. Please advise.
Category: Corrosion

Glass tubing
I've never seen glass tubing used in pharm processes. Why? Also, what grade stainless steel do you use, and how do you prefer to clean it, before usage?
Category: Corrosion

Chloride stress corrosion
Can you explain something about "chloride stress corrosion?" I came across it in a maintenance manual.
Category: Corrosion

Corrosion-resistant dust collector materials
What material of construction would best suit a power that is sprayed with 5% hydrochloric acid? My process needs a new dust collector for this application. I've heard alloy 2205 would be a more cost effective choice over Hastalloy, but will it resist corrosion as well?
Category: Corrosion

Material suitable for sodium hypochlorite
Can you suggest a suitable material of construction for sodium hypochlorite manufacturing? The minimum requirement is better heat transfer and less corrosion.
Category: Corrosion

Salinity endurance of stainless steel
I am a biochemical engineer and want to know whether a bioreactor of material construction of SS316L is capable of withstanding a salinity of 18% and PH 8. If not, what material can substitute stainless steel?
Category: Corrosion

Corrosion of silicon bronze
I would like to know whether silicon bronze corrodes or erodes when used in sea water service?
Category: Corrosion

Defining "Green Chemicals"
As the Industrial Water Treatment Program Manager at the federal installation, I am interested in resorting to "green chemicals" in the chemically treating all the boilers, cooling towers and closed loop systems at this installation. Is there a clear definition of what constitutes "green chemicals?" Does that vary from state-to-state, region-to-region, and who has the final word on what is or isn't "green chemicals?"
Category: Corrosion

Metallizing diverse infrastructure applications
I am interested in metallizing the interior of steel potable and non-potable water, as well as fuel and above and underground storage tanks (ASTs/USTs). The alloy of preference for the metallized coating is 85/15 Al/Zn. I would appreciate any information regarding metallized coatings in addressing the above infrastructure applications.
Category: Corrosion