One of the more frustrating aspects of being a paint applicator is having to deal with the buildup of paint on your racks and fixtures. These custom components are a considerable investment for many applicators and ensuring that they remain functional and lasting is critical to managing a process’s operation cost. Several different methods are used to maintain these components including burn...
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Question:
Can I “overwhelm” my wastewater system?
Answer:
Yes. When wastewater systems are overwhelmed, a pass-through event occurs. If more wastewater goes into the system than the system was designed to handle, the system is not going to be able to remove all the contaminants. The contaminants are going to go out the door. So, when introducing new processes in manufacturing, always c...
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Traditionally, paint stripping was conducted with methylene chloride or DCM, which is an excellent solvent that was prevalent across many industrial applications. As manufacturers began to learn more about the chemical’s toxicity and carcinogenicity, it quickly ran out of favor as safer alternative methods emerged. Organic paint strippers today are much safer and user-friendly. These product...
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Bench testing is not an exact science. Each test can produce slightly different results because every wastewater sample is slightly different. By using bench tests to help determine the best chemicals for the wastewater system, you can eliminate weeks of trial and error on a large scale. You will still need to adjust the wastewater system while the water flows to dial in chemical feeds, but bench ...
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Number 1: Before you put the bath in, passivate the tank and all the plumbing. Passivation is when you’re dissolving the nickel with a nitric acid, using a stainless tank in which you’re putting a passive film which stops it from plating out. A good nitric will stop it from plating out immediately. I’ve seen it happen many times. I’ll get the call and say, “Hey, I put...
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What does Earth Day mean to you? For the metal finishing industry, it means that we continue to make the many parts that make the world go round, from airplane and automobiles to medical devices. If it is metal, we touch it. A side aspect of our industry is that we use millions of gallons of water a year to make these parts. This is water we pull from our communities. In the United States it is es...
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In a recent conversation with Barbara & Ed Kanegsberg (The Cleaning Lady and The Rocket Scientist), we discussed the United States Environmental Protection Agency’s (EPA) Toxic Substance Control Act (TSCA). Congress has asked the EPA to look at existing chemicals and evaluate their risk. They look at them chemical by chemical, step by step.
The risk evaluation is to det...
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Myth 1 of 8: Water is Obviously “Cheaper” than Solvents.
Regular city water alone won’t clean anything. It needs surfactants and detergents that lower surface tension and remove soils. These are consumed during cleaning and need replenishing. Higher temperatures are needed to activate cleaning chemistry, which is important for ensuring good wetting and evaporation after rinsing, ...
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Hubbard-Hall continues to expand the chemical management and distribution services for semiconductor customers by supplying high purity commodity chemistries and representing strategic suppliers with specialty technologies and products. Particularly over the last couple of years, managing the distribution, warehousing of these materials to ensure that no one is shutting down their lines. Fabricati...
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‘I have used TCE for years. Never had a problem. Now it’s a problem!’
Let’s face it, you are in the business of producing metal parts, not dealing with chemistry. If the solvent isn’t cleaning effectively, you simply add more. You probably test for acid acceptance, but not frequently. So why isn’t that enough now?
Older open top degreasers used a lot of solvent ...
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Which is Better, Solvent or Aqueous Cleaning?
The answer? It depends! Surface cleaning of metal components is dependent on numerous factors.
The type and composition of the contaminant
The complexity of the part to be cleaned
The type of metal
How clean is clean?
Available footprint within the shop operation
Parts throughput
Energy costs
Waste treatment availability (in house or haul off)
At a h...
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How does TCE go acid?
Some common conditions that can cause the TCE to go acid are;
Excess water from condensation
Wet parts
Damaged cooling coils
Chlorinated oils
Water-based cutting fluids
Always check with the manufacturer of the vapor degreasing equipment or the supplier of the solvent for guidance.
How do I know if my TCE has gone acid?
An acid acceptance test is the most accurate way to de...
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When considering proper pre and post cleaning of parts, quality is just one consideration for captive heat treaters and commercial shops. The other is the damage that both vacuum and atmospheric furnaces can incur, leaving shops with costly problems to their equipment including: loss of vacuum, contamination to future runs, smoke bombs and shortened quench oil life.
Vacuum Furnaces
3 major manufac...
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A question from a customer: We are a zinc-chloride plater and flow 15,000 gallons per day through a membrane system. We struggle with keeping the membranes running properly. We average between 36 and 48 hours of run time before we must stop and clean the membranes. What can we do to improve the run time?
Wastewater Specialist: “That’s a great question, and in my personal experience as...
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A conversation with Hubbard-Hall’s Robin Deal
Robin is a Field Service Engineer specializing in industrial wastewater treatment for 7 years. She spends much of her time in the field educating customers while helping them meet their wastewater permit requirements. When in the lab Robin is working toward finding efficient ways for customers to transform their wastewater treatment processes to ...
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A question from a customer: “We are a zinc-nickel plater with a discharge of 80,000 gpd. While we are able to meet our zinc and nickel discharge numbers, we struggle with our total suspended solids (TSS). We have a small floc formation with slow settling. We have solids coming over our weir. What can we do to help solve this problem?”
A: When we look at hydroxide precipitation of ...
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I work with many metal finishers that clean the “soft” metals, specifically aluminum and copper alloys. One common, and more recurring issue I see, is staining of these alloys after the forming lubricants are removed in a cleaning step. In the push to go green, many fabricators are switching to water emulsifiable metal working fluids. The formulators of these lubes use different ...
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I present to industry on a regular basis, about the importance of “Process over Product” when it comes to getting clean parts in your metal finishing operation. This was reinforced to me more than ever, during an onsite cleaning trial at a new customer this week.
In this particular case we are cleaning a critical aluminum part, and a improved cleaner was needed. But it is only part of ...
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Surveys show that only 25% of all metal finishing operations in North America offer electropolishing to their customers. With a possible rise in the need for electropolishing thanks to reshoring efforts for medical parts and equipment, demand could outpace availability as manufacturers seek to find finishers to electropolish those parts to a high specificity.
Fortunately, electropolishing lines ar...
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Tackling Hazy Water Hassles With Absolute Clarity
When it comes to cloudy wastewater, there are any number of reasons you can find yourself in a fog. From residual emulsified oil and surfactants to overdosing on polymers and coagulants, Hubbard-Hall’s wastewater treatment technical team can help you diagnose and treat the problem. What are some of the reasons for the cloudy wastewater?...
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Recently, a leading manufacturer of high-value parts for the aerospace industry ran into a cleaning challenge – namely, the cleanliness of parts going through its vacuum brazing process. The existing process was falling short – and experiencing a high field failure rate. Compounding the challenge was a large variation of aluminum alloys and forming processes of the parts.
The customer ...
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A quick list of the most important factors to bear in mind when determining your rinsing process.
Water is becoming an increasingly expensive commodity with even further restrictions in certain areas of the country (pity the poor folks in California). As a result, there has never been a better time to give some thought to maximizing the efficiency of your rinsing process. Put simply, rinsing is a ...
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