The inspection of product quality for pcb treatment system supplier involves multiple dimensions such as appearance, size, performance, and chemical composition. The following is a detailed introduction:
Appearance inspection
Visual inspection
Inspection content: Under sufficient light conditions, directly observe the surface of the etched product with the naked eye. Check for any defects such as scratches, burrs, pits, protrusions, etching residues, unclear patterns, or broken lines.
Detection tool: Natural light or standard light source box to ensure consistent light conditions in the observation environment and reduce misjudgment caused by light differences.
Microscopic examination
Inspection content: Use a microscope to observe the details of the etched pattern, checking the uniformity of the thickness of the lines, the smoothness of the edges, and the integrity of the pattern, etc. For instance, in the field of microelectronics, for etched products, the line width is required to reach the micrometer level, at which point the microscope can clearly observe the microstructure of the lines.
Inspection tools: Optical microscope or electron microscope. Select the appropriate type of microscope based on the precision requirements of the product.
Dimensional inspection
Measurement with general measuring tools
Inspection content: Use general measuring tools such as vernier calipers, micrometers, and height gauges to measure the length, width, thickness, height and other dimensional parameters of the etched products to ensure they meet the design requirements. For instance, for etched mechanical parts, dimensional accuracy directly affects their assembly performance with other components.
Inspection tools: Vernier calipers (with an accuracy of up to 0.02mm), micrometers (with an accuracy of up to 0.01mm), etc. that meet the precision requirements.
Three-coordinate measuring instrument inspection
For etched products with complex shapes and high dimensional accuracy requirements, a comprehensive dimensional inspection is carried out using a three-coordinate measuring instrument. The three-coordinate measuring instrument can precisely measure the spatial dimensions and shape errors of products, such as flatness, perpendicularity, roundness, etc.
Inspection tool: Three-coordinate measuring machine. Select the appropriate model based on the size range and precision requirements of the product.
Performance testing
Corrosion resistance test
Salt spray test: Place the etched products in a salt spray test chamber to simulate the Marine or industrial atmosphere environment. By spraying a certain concentration of salt water spray, observe the corrosion condition of the products within the specified time. For instance, for etched signboards used outdoors, salt spray tests need to be conducted to assess their corrosion resistance in harsh environments.
Electrochemical testing: By using an electrochemical workstation, parameters such as the polarization curve and electrochemical impedance spectrum of the etched products are measured to analyze their corrosion mechanism and corrosion resistance. For instance, for some etched components of chemical equipment with extremely high requirements for corrosion resistance, electrochemical testing can provide more in-depth information on corrosion performance.
Hardness test
The hardness of the etched product is measured using a hardness tester. Common hardness testing methods include Rockwell hardness, Vickers hardness and Brinell hardness, etc. Hardness is an important indicator for measuring a material's ability to resist local plastic deformation. For some etched products that need to bear certain loads, hardness testing can assess their performance in use. For instance, for the etched cutting edge of a tool, it needs to have a certain degree of hardness to ensure its cutting performance.
Testing tools: Rockwell hardness tester, Vickers hardness tester, Brinell hardness tester, etc.
Chemical composition detection
Spectral analysis
The inspection content: Use spectral analyzers, such as spark direct reading spectrometer, X-ray fluorescence spectrometer, etc., to analyze the chemical composition of the etched products. The chemical composition directly affects the corrosion resistance, mechanical properties, etc. of stainless steel. Through spectral analysis, it can be ensured that the chemical composition of the product meets the standard requirements. For example, for the 304pcb treatment system supplier product, it is necessary to test whether the contents of elements such as chromium and nickel are within the specified range.
Detection tools: Spark direct reading spectrometer, X-ray fluorescence spectrometer, etc.
Chemical titration analysis
For some elements with high precision requirements for chemical composition or those that cannot be accurately determined by spectral analysis, chemical titration analysis methods are adopted. The content of specific elements in the product is precisely determined through chemical reactions and titration operations. For example, for some special alloy pcb treatment system supplier products, it may be necessary to use chemical titration analysis to determine the content of trace elements therein.
Testing tools: burettes, volumetric flasks, analytical balances and other chemical analysis instruments.
Adhesion testing
Cross-sectional test
Inspection content: Use a grid cutter to draw grids of certain specifications on the surface of the coating or plating layer of the etched product, then stick tape onto the grids, quickly remove the tape, and observe the peeling of the coating or plating layer. Adhesion is an important indicator for measuring the bonding strength between a coating or plating layer and the substrate. The cross-sectional test can visually assess the magnitude of adhesion. For instance, for products that undergo surface coating treatment after etching, a cross-sectional test is required to ensure that the coating does not fall off easily.
Detection tools: grid divider, tape, etc.
Pull-out test
Testing content: Use a tensile testing machine, fix the tensile head on the coating or plating layer of the etched product, apply tensile force until the coating or plating layer separates from the substrate, and record the magnitude of the tensile force. Pull-out tests can measure the adhesion between coatings or plating layers and the substrate more accurately. For instance, for some aerospace etched components with extremely high adhesion requirements, pull-out tests are commonly used adhesion detection methods.
pcb treatment system supplier https://www.jxxr-pcb.com/Oxide-Replacement-Machine.html