東邦化研 List of Products and Services

We would like to introduce a case where we measured the thickness of a chromate treatment film at our company. For colored chromate metal parts, we performed cross-section processing using ion milling, and observed the cross-section using a field emission scanning electron microscope (FE-SEM) to measure the film thickness. When observing the cross-section of the film with FE-SEM, a chromate layer was confirmed on top of a zinc plating of just over 1μm. Further magnification revealed that the thickness of the chromate layer was approximately 420nm. 【Case Overview】 ■Sample investigated: Chromate ■Cross-sectional film thickness measurement: Measurement of chromate film thickness *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce a case where discoloration due to common metal corrosion was observed and analyzed at our company. Upon observation with a scanning electron microscope (SEM), traces of corrosion were confirmed. This discoloration is presumed to have occurred due to the corrosion of iron material beneath the nickel plating, resulting in the precipitation of rust, which is the product of that corrosion, on the surface. 【Case Overview】 ■Observation of Discolored Area: Magnified view of the discolored area ■Magnified Observation and Elemental Analysis: Further magnified observation and elemental analysis of the discolored area ■Structural Analysis: Structural analysis using Raman spectroscopy ■Cause of Discoloration: The discoloration is primarily due to the corrosion of iron, known as "red rust." *For more details, please refer to the PDF document or feel free to contact us.

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This is a case study on the corrosion of brass products using a copper chloride aqueous solution, focusing on the areas where dezincification occurred, including surface observation and cross-sectional analysis. The corroded areas show white corrosion products due to the corrosion of zinc. Observations with a digital microscope revealed traces of immersion at the boundary between the corroded and normal areas. Element mapping results from the cross-section where dezincification occurred confirmed that the surface is covered with corrosion products of zinc, while copper (Cu) is distributed in the areas where dezincification took place. [Case Summary] - Observation of Corroded Areas: Observing the boundary of corrosion - Magnified Observation and Element Analysis: Further magnified observation and elemental analysis of the corroded areas - Element Mapping: Investigating elemental distribution in the cross-section *For more details, please refer to the PDF document or feel free to contact us.

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This is a case study on the observation of the surface and cross-section of activated carbon, which is used as a filter in a general-purpose silica gel and ultrapure water production device. By observing the cross-section of silica gel, its porous nature was evident, while the characteristic honeycomb structure of wood was observed in activated carbon. The voids and mesh-like physical shapes seen in these materials increase the surface area, resulting in higher adsorption capacity, allowing them to function as deodorants. [Case Summary] - Investigation Samples: Silica Gel, Activated Carbon - Magnified Observation of Silica Gel: Is the porosity visible? - Magnified Observation of Activated Carbon: Honeycomb structure observed in activated carbon *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce a case study conducted at our company regarding three types of anodized products sold as tableware: gold, light gold, and silver, which were investigated from both the surface and cross-section. By creating a cross-section of the anodized coating through ion milling and measuring its thickness, we found that the gold was approximately 10μm, the light gold was about 7μm, and the silver was around 12 to 13μm. Additionally, it was confirmed that the difference in the intensity of the gold color (the difference between gold and light gold) is due to the variation in film thickness. [Case Overview] ■ Surface magnified observation: Differences in "shape" on the surface ■ Cross-section magnified observation: Measurement of film thickness and observation of the shape of the outermost surface *For more details, please refer to the PDF document or feel free to contact us.

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This is an introduction to a case where business cards were targeted as familiar samples for micro-sampling of small particles. Only the blue ink was collected from a portion of the printed text. By using a tungsten probe with a tip diameter of 1μm to collect and gather the blue ink, it formed a mass of nearly 100μm. Additionally, in areas where there were other colors of ink surrounding it, only the inner blue ink could be collected. There are situations in pre-analysis preparation where it is necessary to "extract only the required parts" or "remove unnecessary parts." [Case Overview] ■ Target Sample: Business Card ■ Micro-sampling of Small Particles: Collection of ink approximately 10μm *For more details, please refer to the PDF document or feel free to contact us.

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We present a case study where we created a cross-section to investigate the plating layer of a car door handle cover, followed by magnified observation and elemental mapping using a scanning electron microscope (SEM). For the plated section, we created a cross-section using ion milling and measured the thickness. The total plating thickness was found to be approximately 11-12 μm, with the thin outermost plating (chrome) measuring about 85 nm, and the second layer of plating underneath measuring about 850 nm. Additionally, the elemental mapping results confirmed that the substrate was a thick copper plating, with nickel plating applied on top of it, followed by chrome plating. [Case Overview] - Investigation Sample: Car Door Handle Cover - Cross-Section Observation: Measurement of Plating Thickness - Elemental Mapping: Investigation of Element Distribution *For more details, please refer to the PDF document or feel free to contact us.*

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In the Materials Analysis Department, we provide observation, analysis, and analytical services using various instruments and data. Our "Magnified Observation Service" enables understanding and addressing situations by performing magnified observations using various tools. We accommodate a wide range of observations, including surface shapes, cross-sectional shapes, foreign substances, contaminants, discoloration, and corrosion. [Features] - Elemental analysis at the observation site is possible - Consultation regarding desired observation locations and methods is available - We can create cross-sectional samples for observation - Sending observation data only is also acceptable *For more details, please download the PDF or feel free to contact us.

• Contract Analysis
• Contract measurement
• Contract Inspection