Overall visualization of the surface condition of a non-conforming part

A comprehensive visualization of the surface condition of a non-conforming part allows for the identification of the origin of a defect, an understanding of its mechanisms, and an assessment of its potential impact on the performance or safety of the final product. When a component exhibits a visual, mechanical, or functional anomaly, macroscopic and microscopic observation constitutes the first step in a rigorous failure diagnosis. This analysis is essential in the packaging, materials, and polymers sectors, as well as in any industry where the quality and dimensional conformity of parts must be guaranteed.

Principle and operation of observation

Surface examination combines different techniques depending on the type of defect, the geometry of the part, and the required level of resolution. Observation with a binocular microscope allows for rapid inspection at low magnification and highlights overall anomalies such as surface cracks, deformations, deposits, bubbles, striations, or machining defects. It constitutes a first step before more detailed analysis. When defects are too small, too deep, or require detailed characterization, scanning electron microscopy (SEM) offers high resolution, enabling observation of topography, delamination zones, microcracks, inclusions, roughness, or patterns characteristic of fracture or aging. SEM can be combined with elemental analysis via EDS/EDX to identify the composition of contaminants, deposits, or inclusions. Together, these tools allow for a precise diagnosis of the nature, origin, and propagation of the observed defect.

Defects identifiable through surface observation

Advanced visual analysis enables the detection of a wide range of defects that can compromise a product's quality or safety. Commonly observed anomalies include: cracks due to mechanical or thermal stress, material inclusions, dust or foreign particles, injection molding defects in polymers, brittle or ductile fractures, surface blisters or bubbles, areas of abrasion or premature wear, manufacturing residues, oxidation or surface corrosion on certain parts, sealing defects in packaging, and flatness issues. Visualization also allows for the assessment of coating homogeneity, the continuity of a protective film, the presence of microcavities, and the propagation of a crack across the entire surface of a part.

Industrial applications

In the packaging industry, this analysis is used to understand weld defects, delaminations, surface contamination of materials, and premature failures. It allows for verification of the structural integrity of films, trays, lids, and plastic components. In the field of polymers, it is used to address issues related to injection molding, extrusion, molding, and aging, identifying defects linked to the material, the process, or the conditions of use. For technical parts, surface visualization is a key tool for failure studies, quality control, supplier qualification, and the validation of new processes. It makes it possible to determine whether the defect is related to a material non-conformity, incorrect production settings, or damage during use.

Matrices and parts analyzed

This analysis covers a wide variety of materials and parts: polymers, engineering plastics, composites, packaging films, injection-molded parts, metallic materials, organic or inorganic coatings, samples from ruptures, contaminated surfaces, and areas with cosmetic or structural defects. Any part exhibiting a visual or functional anomaly can be included in this study, whether it is a single sample or an entire batch requiring comparative analysis.

Added value YesWeLab

Thanks to a network of laboratories specializing in surface observation, microscopy, and failure analysis, YesWeLab selects the most suitable technical expert for you based on your matrix, the type of defect, and the required resolution. Our partners are primarily certified or accredited (ISO 17025, COFRAC). Our scientific team supports you in defining your needs, selecting the observation technique, interpreting the results, and formulating hypotheses about the origin of the non-conformity. Since 2020, industrial companies, engineering firms, and manufacturers have entrusted us with their samples via our digital platform to benefit from responsive, rigorous, and confidential processing.

Related analyses in the YesWeLab catalog

To complement a surface visualization, the following services are particularly relevant:

• SEM analysis with EDS (elemental composition)
• Roughness measurement and 3D topography
• FTIR analysis for the identification of polymers and contaminants
• Mechanical tests (tensile, flexural, hardness)