Corrosion in industrial packaging poses a direct risk to the stability of the formulation and the safety of the product. The chemical interaction between the contents and the container requires an evaluation of the mechanical and chemical properties of metals to ensure an effective protective barrier.
The Impact of Corrosion on Industry
Corrosion occurs due to the electrochemical interaction between the base metal, ambient moisture, and the active ingredients in the formula. This phenomenon gradually degrades the internal structure of the container, leading to the formation of porosities and micro-leaks that are imperceptible to the naked eye.
These structural changes allow oxygen to enter and gases or propellants to escape, triggering the premature degradation of the product. In critical sectors such as pharmaceuticals, cosmetics, and aerosols, this directly compromises the viscosity, pH, and efficacy of the active ingredients.
In addition to damaging the integrity of the formulation, internal corrosion causes the release of metal particles that contaminate the contents. This not only alters the organoleptic properties but also renders the quality controls required by industry regulators invalid.
Preventing corrosion-related failures is essential to protecting the product’s shelf life, reducing significant logistical losses due to wastage, and ensuring strict compliance with international health and industrial standards.
Technical Comparison of Materials
Tinplate
Tinplate is steel coated with a thin layer of tin. Although it provides rigidity, the manufacturing process requires welded side and bottom seams. These joints and microcracks in the tin coating represent vulnerable points where galvanic or crevice corrosion can begin when exposed to aggressive contents.
Steel
Steel without special alloys is highly susceptible to atmospheric oxidation and reacts rapidly with moisture or acidic compounds. To mitigate this, it requires complex coatings; however, bent or assembled areas remain vulnerable to corrosion.
Monoblock aluminum
Because it is manufactured as a single piece without welds or seams, the monoblock structure eliminates mechanical stress concentrations and cracks. In addition, it allows for the application of continuous internal and external coatings that ensure complete chemical compatibility.
To select the optimal material, the technical department must evaluate the pH, the presence of oxidizing agents, and the viscosity of the contents. The monoblock aluminum design minimizes critical failure points compared to steel or tinplate solutions.
In turn, this alternative combines high protective performance with the sustainability of an infinitely recyclable material, ensuring an efficient transition to safe and durable packaging.
