---
type: "WebPage"
title: "Laboratory BET analysis of surfaces and coatings"
description: "Characterize the specific surface area of your surfaces and coatings with BET analysis The properties of a coating do not depend solely on its chemical composition. Its specific surface area, porosity, and adsorption capacity directly influence its functional performance: adhesion,..."
resource: "https://filab.fr/en/our-services/our-analysis-services/laboratory-surface-characterization/laboratory-bet-analysis-of-surfaces-and-coatings/"
tags: ["EN", "Anaïs DECAUX"]
timestamp: "2026-07-02T08:07:51Z"
published: "2026-07-02T08:07:51Z"
language: "en"
author: "Laure Durieux"
---

# Laboratory BET analysis of surfaces and coatings

## Characterize the specific surface area of your surfaces and coatings with BET analysis

The properties of a coating do not depend solely on its chemical composition. Its **specific surface area**, **porosity**, and adsorption capacity directly influence its functional performance: adhesion, anticorrosion protection, catalytic activity, filtration, interaction with a liquid or gaseous medium, and even biocompatibility.

[BET analysis](https://filab.fr/en/our-technical-resources/laboratory-analysis-bet.md) (Brunauer-Emmett-Teller) makes it possible to accurately measure the [specific surface area](https://filab.fr/en/our-services/our-analysis-services/laboratory-analysis-powder-characterization/measurement-specific-surface-area-bet-iso-9277.md) developed by a surface or coating from gas adsorption.

At FILAB laboratory, this technique is used to characterize industrial [coatings](https://filab.fr/en/our-services/our-analysis-services/laboratory-surface-characterization/laboratory-surface-coating-characterization.md), functional layers, and treated [surfaces](https://filab.fr/en/our-services/our-analysis-services/laboratory-surface-characterization.md) as part of development, qualification, quality control, or expert assessment studies.

### Why measure the specific surface area of a surface or coating?

Specific surface area is a key indicator of the quality and performance of coatings and surfaces.

A change in this property may reveal:

- a change in the deposition process;
- excessive porosity;
- surface contamination;
- coating aging;
- loss of functional efficiency;
- degradation after use.

BET analysis therefore makes it possible to compare several coatings, monitor their evolution over time, or validate production compliance.

### What parameters are measured during BET surface and coating analysis?

BET analysis makes it possible in particular to determine:

- specific surface area (m²/g);
- total pore volume;
- pore distribution (depending on the methods used);
- average pore diameter;
- adsorption and desorption isotherms;
- the material's adsorption behavior.

This information is essential for understanding the material's physical properties and guiding development or production decisions.

## What industrial issues can be investigated by BET analysis of surfaces and coatings?

BET analysis addresses many challenges faced by manufacturers.

 Qualification of a new coating
You want to demonstrate that your deposition process produces a surface that meets the expected performance requirements.

 Comparison of surface treatment processes
You are comparing different processes (thermal spraying, PVD, CVD, anodizing, chemical treatments, etc.) and want to measure their influence on the developed surface area.

 Failure analysis
A coating shows loss of adhesion, reduced performance, or premature aging.

BET analysis makes it possible to assess whether a change in surface structure or porosity can explain this failure.

 Quality control
You want to verify the reproducibility of your surface treatments across several production batches.

 Research & development
You are developing a new functional coating and are looking for quantitative data to optimize its structure.

## Our other technical methods for surface and coating characterization

 [### SEM-EDX

Observation of morphology and porosity](https://filab.fr/en/our-technical-resources/laboratory-analysis-sem-scanning-electron-microscopy.md) [### XPS

Chemical characterization of the first nanometers of the surface](https://filab.fr/en/our-technical-resources/laboratory-analysis-xps-esca.md) [### ToF-SIMS

Detection of contaminants and surface molecular analysis](https://filab.fr/en/our-technical-resources/laboratory-analysis-tof-sims.md) [### Raman

Identification of chemical phases and surface compounds](https://filab.fr/en/our-technical-resources/laboratory-analysis-raman-spectroscopy.md) [### AFM

Nanometric topography, fine roughness](https://filab.fr/nos-moyens-techniques/laboratoire-analyse-afm.md)
### ICP-OES / ICP-MS

Quantitative determination of major and trace elements

### Why choose FILAB for BET analysis of surfaces and coatings?

Beyond carrying out a BET measurement, the experts at FILAB laboratory support you in interpreting the results to address your industrial challenges:

- validation of a surface treatment process;
- comparison of coatings;
- failure analysis;
- optimization of a deposition process;
- characterization of functional layers;
- development of new materials.

## Our FAQ

 What types of coatings can be characterized by BET?
BET analysis is suitable for many coatings and functional surfaces, including:

- ceramic coatings;
- porous metallic coatings;
- oxide layers;
- functional layers;
- catalytic supports;
- membranes;
- filter materials;
- metal foams;
- sintered materials;
- coatings produced by thermal spray processes.

Feasibility depends on the nature of the sample, its porosity, and its developed surface area.

 Can BET analysis measure the thickness of a coating?
No. BET analysis measures the **specific surface area** and porosity characteristics of a material. To determine the thickness of a coating, other characterization techniques must be used, such as cross-sectional scanning electron microscopy (SEM), profilometry, or other methods suited to the type of deposit.

 In which industrial sectors is BET analysis used?
BET analysis is used in many industrial sectors, including:

- aerospace;
- space;
- automotive;
- defense;
- energy;
- nuclear;
- chemicals;
- medical devices;
- electronics;
- cosmetics;
- water and air treatment.

It is particularly relevant for the development, qualification, and quality control of functional surfaces and coatings.

 Can BET analysis highlight a coating defect?
BET analysis does not allow direct observation of a defect (crack, delamination, scratch), but it can reveal a change in specific surface area or porosity indicating coating degradation. It is generally combined with microscopic observations and chemical analysis to identify the origin of the failure.

 How can i get a quote for BET analysis of surfaces and coatings with FILAB?
To get a quote, you can contact our teams via our contact form, by phone, or by email.
All you need to do is send us your requirements (material type, desired analysis, applicable standard, urgency, number of samples, etc.). We will then send you a customized technical and pricing proposal within 24-48 hours.

 What is the typical turnaround time for analysis?
Lead times vary depending on the nature of the analysis and the complexity of the expert assessment project.
However, FILAB is committed to providing fast turnaround times tailored to your constraints and industrial urgencies.