Corrosion is one of the biggest enemies of materials—especially metal tools and machinery—and proper identification and treatment are essential for the long-term durability of industrial equipment. Different forms of corrosion exhibit various symptoms and effects, so it is crucial to recognize and diagnose them effectively.
In this blog post, we review the different types of corrosion, present their characteristic symptoms, and describe the most commonly used diagnostic methods.
1. Uniform Corrosion
Uniform corrosion is one of the most common types, occurring when the surface of metal tools and machinery deteriorates evenly across nearly every point. It is usually triggered by the presence of moisture, oxygen, or chemicals. Although this type progresses slowly, it steadily reduces material thickness and may not require immediate replacement—but it can cause serious problems over time.
Even rust formation on the surface
Gradual loss of strength without sudden brittleness
Visual inspection and microscopic analysis are the most common techniques. Surface examinations reveal the uniform distribution of corrosion.
2. Pitting Corrosion
Pitting corrosion occurs in small, localized spots. It is particularly dangerous when affecting materials sensitive to corrosion, such as stainless steel or various alloys. Electrochemical reactions create small pits on the metal surface, which may deepen over time.
Small, but deep pits on the surface
Localized, intense oxidation
Microscopic analysis is the best method to detect pitting corrosion. Under magnification, surface irregularities and deep, oxidized pits become visible.
3. Crevice Corrosion
Crevice corrosion forms when corrosion reactions occur within microscopic cracks on the metal surface. This is particularly dangerous, as corrosion can quickly spread through these cracks, leading to fractures and complete structural failure.
Microscopic cracks on the metal surface
Oxidation spots along the crevices
Diagnostic methods:
Detection involves microscopic analysis, but ultrasonic testing and leak testing can also help identify issues at an early stage.
4. Intergranular Corrosion
This type occurs within the grain structure of metals (the microscopic internal structure), and is typically observed in materials composed of multiple elements. Intergranular corrosion happens when different components of a metal alloy corrode at different rates.
Deterioration of the metal’s internal structure
Gradual weakening of the material, leading to structural failure
Diagnostic methods:
X-ray and microscopic inspections are used to detect intergranular corrosion by examining the metal’s internal structure.
Our company’s expertise and services offer the best solutions for preventing corrosion. In addition to proper maintenance and regular inspections, industrial painting, protective coatings, and appropriate material selection are essential for long-term protection.
Fémtiszta Kft. offers high-pressure water cleaning, sandblasting, and industrial painting to ensure long-lasting protection for your industrial equipment and machinery. Request a quote today and let us provide the most effective solutions for protecting your metal surfaces!
