Diffusion Intermediate Surface Treatment for Homogeneous Acidification

The patent introduces relative movement between the support and the corrosive mixture during application. The support moves relative to the mixture in a direction substantially parallel to the surface, ensuring uniform contact time across the entire surface area. This dynamic approach resolves the contradiction by maintaining operational simplicity while achieving homogeneous acidification through controlled motion rather than static capillary action alone.

The patent eliminates the use of substrates that create masked areas by directly applying the corrosive mixture to the surface using a support that contacts only the edge or perimeter of the surface. This segmentation approach ensures that the bulk of the surface is fully exposed to the corrosive mixture without obstruction, achieving complete coverage while maintaining ease of operation through simple peripheral support.

The patent extracts the essential function of surface coverage from complete immersion treatment. Instead of submerging the entire surface in large volumes of corrosive solution, the invention applies the mixture locally using a support that delivers the corrosive agent directly to the surface area requiring treatment. This extraction approach achieves complete surface coverage with minimal corrosive solution volume, thereby reducing contamination and environmental impact while maintaining treatment effectiveness.

The patent enables the corrosive mixture to perform its treatment function through its own capillary action and natural flow properties without requiring external agitation devices or specific gas conditions. The support structure facilitates direct contact between the mixture and surface, allowing the treatment process to be self-sufficient. This self-service approach maintains treatment effectiveness while eliminating the need for complex agitation systems or controlled gas environments, thereby reducing process complexity.