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Getting the Rust Out: Metal Finishing Solutions for Rust or Corrosion

Imagine processing and shipping thousands of parts to your customer – only to discover your shipment was rejected due to rust.

 

Rust or corrosion is a significant issue in manufacturing facilities large and small, impacting resources and increasing operating costs. Rust is difficult to prevent and nearly impossible to anticipate on manufactured parts.

 

Remove rust and corrosion

 

When rust occurs, leading manufacturers look to Latem Industries for metal finishing solutions. Here’s how we can help.

 

So, What Exactly Is Rust?

Rusting is the common term for corrosion of iron and its alloys, such as steel.

 

Rust is an iron oxide (usually a red oxide) that forms when iron and oxygen react in the presence of water or air moisture. There are several types of rust that form under different circumstances and are distinguishable visually and by spectroscopy.

 

Surface rust can be spotted or flaky and does not protect the underlying iron, which enables the oxide to grow. With enough time, oxygen and moisture will eventually convert an iron part entirely to rust and disintegrate it.

 

How Latem Solves the Problem

Latem Industries uses various processes to remove rust or corrosion from processed parts:

The best process for removing rust from mass quantities of parts is often determined by the extent of the corrosion and the geometry of the part.

 

For minor rust problems around your home or workshop, you can try using this simple home solution: salt + lime. Sprinkle a little bit of salt on the rust, then squeeze the lime over the salt until it is soaking. Let the mixture sit for 2-3 hours and then remove the rust with the lime rind. This can also be done with a lemon, but we like the salt and lime a little more because they double as margarita ingredients.

 

Mass Metal Finishing Solutions for Rust or Corrosion

Latem (metal spelled backwards) has the capacity to clean away rust from millions of parts daily. Whether the part is the size of a thimble or as large as a sheet of steel, we have the best processes available to quickly and cost-effectively remove rust.

 

Once the rust is removed, we treat each and every piece with a rust inhibitor.

 

So, when rust impacts your operations, call Latem or use the easy Get a Quotation link on our web page.

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Latem Industries is Proudly an ISO 9001:2015 Certified Metal Finisher

The team at Latem Industries is proud to announce our recognition as an ISO 9001:2015 certified metal finisher. We’ve worked hard to implement processes and produce results that meet these rigorous quality standards.

 

 

For Latem Industries (and our metal coating company Plastico Industries), ISO 9001:2015 certification means:

  • Latem Industries’ top management demonstrates leadership and commitment to upholding a Quality Management System that meets ISO 9001:2015 standards.
  • Our Quality Management System comprehensively addresses risks, opportunities, changes and quality objectives.
  • We have plans and processes in place to meet our customers’ requirements for our services.
  • All our employees have the training and resources they need to support our Quality Management System.
  • The roles and responsibilities necessary to uphold this commitment have been assigned, communicated and understood.
  • We continuously monitor, measure, analyze, and evaluate our Quality Management System with an aim to improve wherever we can.

Below, we’ll explain why being an ISO 9001:2015 metal finisher matters to us and our customers.

 

ISO 9001:2015 Certification: What Does it Mean?

The ISO is the International Organization for Standardization, an independent international organization that sets quality, safety and efficiency standards.

 

These standards apply across all industries, products and services, including metal finishing. The ISO is recognized worldwide and endorsed by both the Standards Council of Canada (SCC) and the American National Standards Institute (ANSI).

 

ISO 9001:2015 is the latest revision to these standards. ISO 9001:2015 provides a clear roadmap to guide companies like Latem Industries in meeting (and surpassing) customer expectations and regulatory requirements.

 

Being ISO 9001:2015 certified is something that matters both to us and our customers. Internally, it demonstrates our commitment to the quality and consistency our customers expect. That means delivering exceptional metal finishing services and customer service that goes above and beyond what our customers expect.

 

When you see that a company has earned ISO 9001:2015 certification, you can trust that their promises are backed by a universal quality management process.

 

Latem’s ISO 9001:2015 Certificate

How do you know if a company is ISO 9001:2015 certified? A Certificate of Registration like this one.

 

This certificate demonstrates that Latem Industries’ Quality Management System and processes passed an independent audit by an accredited certification body. Our audit was conducted by The Registrar Company, a trusted certification body accredited by the ANSI-ANQ National Accreditation Board (ANAB).

 

ISO 9001:2008 vs. ISO 9001:2015

If you’re already familiar with the previous standards set in 2008, you’ll find few changes in the ISO’s current criteria. What has changed is:

  • New structure (expanding from 8 clauses to 10)
  • Renewed focus on top-level accountability, involving the highest levels of management in implementing and maintaining ISO standards
  • Emphasis on risk management throughout the organization, using the system as a preventative tool that encourages continuous improvements to process
  • More flexibility for organizations like Latem Industries to develop ISO documentation in a format that meets our needs as a industrial metal coater
  • Alignment with other key management system standards

Work with a Certified Metal Finisher

Latem Industries is proud to produce results that meet internationally-recognized quality standards. Start working with an ISO 9001:2015 certified industrial metal finisher today.

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Will Barrel Tumbling or Vibratory Finishing Damage My Metal Parts

Mass finishing technologies like barrel tumblers and vibratory machines enable us to finish massive quantities of parts in a short time.

 

However, some customers raise concerns about the impact mass metal finishing will have on their products. Will barrel tumbling or vibratory finishing cause damage to metal parts?

 

 

An experienced mass metal finisher will understand the measures one must take to avoid damaging the parts during the finishing process. These considerations include:

  • Choosing the correct finishing method for the part
  • Selecting an appropriate media
  • Filling the chamber with a proper media-to-part ratio
  • Adjusting machine settings

With proper preparation and media selection, metal parts should survive the barrel tumbling or vibratory finishing process unscathed — save for the imperfections the process is designed to remove.

 

Mass Metal Finishing: Vibratory Finishing vs Barrel Tumbling

Vibratory finishing and barrel tumbling are methods of preparing metal parts for coating. Both processes are widely used for polishing, burnishing, de-scaling, de-flashing, radiusing, and deburring services.

 

The difference between barrel tumbling and vibratory finishing is how the machines create the friction required to remove imperfections from the metal parts.

 

In barrel tumbling, the parts are placed in a tumbling barrel along with finishing media (small pieces of metal, ceramic, or other materials) and compounds (like cleaners and polish). The barrel rotates at a set speed, causing the parts inside to tumble against the media and each other.

 

With vibratory finishing, the parts, media and compounds are placed into a tub, and instead of spinning like a barrel tumbler, the tub vibrates rapidly. The vibration causes the parts and media to rub together.

 

For some parts, the force of barrel tumbling is necessary to get a good, clean finish; in other cases, barrel tumbling is too harsh, even with a lighter choice of media. Vibratory finishing is generally easier on parts than barrel tumbling. The correct choice depends both on the part and the desired finish.

 

Choosing the Correct Finishing Method

The shape and size of the metal parts in question is a significant factor when choosing the correct finishing method that won’t cause damage.

 

Simple shapes, like spherical and cube-like parts, can often withstand barrel tumbling with no risk of damage. More delicate parts (with thin pieces, small details, protrusions or openings) tend to be better-suited to a vibratory machine.

 

Selecting an Appropriate Media

To produce a quality finish, the finishing media must be able to reach all surfaces of the part without causing damage or becoming lodged in gaps or crooks. There is a wide variety of finishing media available for all different types of parts and finishes, the most common of which are made of steel, ceramic, or plastic.

 

Lighter, smaller media are usually more appropriate for delicate parts, while sturdy parts can go into the barrel with larger, heavier materials.

 

Media-to-Part Ratio

In addition to rubbing against the parts to remove imperfections, media acts as a cushion that prevents parts from hitting each other too forcefully inside the machine. If there is not enough media between them, the parts will collide and potentially take damage during the finishing process. Delicate parts call for a higher media-to-part ratio.

 

Machine Settings

Barrel tumblers have adjustable rotation speed, and vibratory machines can vibrate faster or slower depending on the machine’s settings. The person operating the machine must choose settings that fit the job.

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5 Benefits of Barrel Tumbling for Mass Metal Finishing

Barrel tumbling is a mass metal finishing technique that can be used to achieve a number of surface finishes. It involves placing an unfinished metal piece into a horizontal barrel, along with cleaning compounds and finishing media, and using centrifugal force to work a clean surface. The benefits of barrel tumbling make it the ideal technique for manufacturers that need consistent results fast.

 

 

1. Consistency

Consistency is a key aim in mass production, but metal parts don’t always come off the line looking entirely uniform. It is not only a matter of appearance, but function, as sharp edges and other deficiencies can impact the performance of the part.

 

The barrel tumbling process is an efficient way to smooth imperfections that stand in the way of a consistent batch. Mass metal finishing delivers far more consistent results than polishing by hand.

 

If you and your purchasers demand perfection of your parts, barrel tumbling is the way to go.

 

2. Speed

Need a fast finish? Barrel tumbling can keep pace with even the leanest production schedules. In fact, Latem processes millions of parts through our vibratory and tumbling departments each week.

 

Depending on the part in question, a complete barrel tumbling cycle can take between just six and 24 hours, and the consistency of this technique means you won’t have to watch the clock.

 

3. Versatility

Another benefit of barrel tumbling is the equipment’s versatility. We can calibrate barrel tumbling machines to achieve many different results, from mirror-finishes to edge breaking to rust and oil removal. The choice of finishing media, additives (like cleaners and rust inhibitors) can also be used to fine-tune the end product.

 

We use dozens of barrel tumbling machines here at Latem, and each is set up to attain a different finish.

 

4. Mass Finishing

Our barrel tumbling equipment is designed to process a massive volume of parts as efficiently as possible. The technique allows one to process dozens of orders at once with little handling required. Using barrel tumbling, even a modestly-sized team can finish swaths of parts in a short time.

 

5. Toughness

Barrel tumbling is tough. The technique is considerably more aggressive than vibratory finishing, making it ideal for those smaller, harder metal pieces that need serious work. It is possible to vary the impact of the process by adjusting the equipment and finishing media, but on the whole, barrel tumbling is suited to tougher mass metal finishing jobs.

 

There are other things to consider when choosing between vibratory finishing and barrel tumbling, of course. The weight and geometry of the part, as well as its present condition and the desired finish, are also factors. As experts in both techniques, the Latem Industries team can advise you on which metal finishing method will best meet your demands.

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Five Steps to Prepare Metal Parts for Coating

prepare metal parts for coating

 

When given the proper protective coating, metal parts can function more effectively and last much longer. However, before the coating process can start, an important preliminary procedure is necessary. As the effectiveness of the coating depends greatly on the quality of the surface, not performing pre-treatment means the surface is in less-than-optimal shape. That leaves the metal open to corrosion, adhesion, flash rusting, weld pullaway, and impact resistance issues, the very problems that proper coating prevents. Here are five common pre-treatment steps to prepare metal parts for coating.

 

Disassembly

 

Many different types of parts pass through our facility every year. Some are single pieces, while others consist of several different components. In most cases, the latter requires disassembly, because the coating process will not benefit each part (or could even damage some).

 

Cleaning

 

Just as you would not paint a dirty surface in your home, some parts need to undergo cleaning before coating begins. Pressure washing and ultrasonic cleaners are very effective methods. Extra care is necessary when using cleaning solutions as some metals are especially sensitive. Exposure to the wrong chemicals can create damage that is not visible to the naked eye, but serious enough to compromise both the coating process and the life/utility of the part.

 

Our sister company, Plastico Industries, uses proprietary cleaning compounds that produce excellent results, while also being environmentally friendly.

 

Stripping

 

Even after cleaning, it may be necessary to perform this additional step to ensure an entirely clean surface. Some parts are not new and already have remnants of a previous coating still on them. It is necessary to strip any remaining bits of paint, plastic or another form of finish before applying the new coating. Failure to do so means the new layer will not properly adhere.

 

Outgassing

 

The idea is to make sure you reach bare metal before the coating process begins; outgassing is another way to achieve this. It is not obligatory for all parts, but ones made of cast aluminum or cast iron tend to be more porous. That can allow oil and other contaminants to get inside. Applying the coat with those materials still present undermines the part’s ability to perform and last the expected lifespan.

 

Outgassing involves baking the part in an oven at a temperature that causes the oils to burn off. There is often some smoke generated as a result.

 

Shot Blasting and Shot Peening

 

Shot blasting involves the high-speed projection of steel shot at the material chosen for coating. The shot permeates the surface, and this dislodges the foreign matter. The blasting media used varies depending on the type of metal being treated and the desired finish.

 

Shot peening will also clean the surface of parts scheduled for coating. With this process, the shot performs the same function as a ball-peen hammer. Both of these processes have the added benefit of strengthening the metal, thus reducing the likelihood of corrosion, cracking, and stress failure.

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