Hey there! As a supplier of aerospace sheet metal parts, I've been getting a lot of questions lately about the outgassing requirements for these parts in space. So, I thought I'd take a moment to break it all down and share what I know.
First off, let's talk about what outgassing is. In simple terms, outgassing is when a material releases gas or vapor. This can happen when the material is exposed to different temperatures, pressures, or other environmental conditions. In the context of aerospace sheet metal parts, outgassing can be a big deal because it can cause a whole host of problems in the harsh environment of space.
One of the main issues with outgassing in space is that the released gases can condense on sensitive equipment, like optical lenses, sensors, and solar panels. This can lead to a decrease in performance or even complete failure of the equipment. For example, if a gas condenses on an optical lens, it can cause haze or distortion, which can make it difficult or impossible to get clear images.
Another problem is that outgassing can create a contamination layer on the surface of the parts. This layer can affect the thermal properties of the parts, which can lead to overheating or other issues. In addition, the contamination can also react with other materials in the spacecraft, which can cause corrosion or other forms of damage.
So, what are the outgassing requirements for aerospace sheet metal parts in space? Well, there are a few different standards and guidelines that are used to determine these requirements. One of the most widely recognized standards is ASTM E595, which is a test method for measuring the total mass loss (TML) and collected volatile condensable materials (CVCM) of materials in a vacuum environment.
According to ASTM E595, the maximum allowable TML for materials used in space applications is typically 1.0%, and the maximum allowable CVCM is 0.1%. These limits are set to ensure that the outgassing from the materials is minimal and will not cause any significant problems in the spacecraft.
In addition to ASTM E595, there are also other standards and guidelines that are specific to different aerospace applications. For example, the NASA ASTM E1559 standard is used for materials that are used in optical applications, such as mirrors and lenses. This standard has even more stringent requirements for outgassing, as the optical components are very sensitive to contamination.
As a supplier of aerospace sheet metal parts, it's our responsibility to ensure that our parts meet these outgassing requirements. We use a variety of techniques and processes to reduce the outgassing of our parts, including:
- Material selection: We choose materials that have low outgassing properties, such as stainless steel, titanium, and aluminum alloys. These materials are known for their high strength, corrosion resistance, and low outgassing characteristics.
- Cleaning and degreasing: Before the parts are fabricated, we clean and degrease them thoroughly to remove any contaminants, such as oils, greases, and fingerprints. This helps to reduce the amount of outgassing from the parts.
- Heat treatment: We use heat treatment processes to reduce the internal stresses in the parts and to improve their mechanical properties. Heat treatment can also help to reduce the outgassing of the parts by removing any trapped gases or volatile compounds.
- Vacuum baking: We bake the parts in a vacuum oven to remove any remaining volatile compounds. This process helps to ensure that the parts meet the outgassing requirements before they are shipped to our customers.
At our company, we have a state-of-the-art testing facility where we can test the outgassing properties of our parts using ASTM E595 and other standards. This allows us to ensure that our parts meet the highest quality standards and are suitable for use in space applications.
In addition to aerospace sheet metal parts, we also offer a wide range of other sheet metal parts, including Bent Sheet Metal Parts, Welding Equipment Sheet Metal Parts, and Automotive Sheet Metal Parts. Our parts are made using the latest manufacturing techniques and are of the highest quality.
If you're in the market for aerospace sheet metal parts or other sheet metal parts, we'd love to hear from you. We offer competitive pricing, fast turnaround times, and excellent customer service. Whether you're a small startup or a large aerospace company, we can provide you with the parts you need to meet your requirements.
So, don't hesitate to contact us today to discuss your project and get a quote. We look forward to working with you!
References
- ASTM E595 - Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment
- NASA ASTM E1559 - Standard Test Method for Measuring the Degradation of Optical Materials Due to Outgassing in a Vacuum Environment