K-2 GEN NXT Red Paste for Stainless Steel Weld Seams
A single step Pickling Passivation Product for Stainless Steel and its Alloys. Product Confirms to ASTM A-967
Single Step Process for Pickling and Passivation
Reduction in fumes to negligible level
Red in colour helping easy identification post application
Improves Corrosion Resistance
Provides smoother and whiter surface
No change in grain structure of the base material
Improves Process Efficiency
Improves Human Safety and Reduces Risk
Quality Improvement
Improves Product Life
Better Homogeneity
Improves Visual Inspection

WHY TO PICKLE & PASSIVATE ON STAIN
Pickling & passivation ensures corrosion resistance for components of stainless steel ancl thus influences its life ancl use.
The corrosion resistance of stainless steel is due to the presence of atleast thirteen percent chromium in the alloy.With oxygen, the chromium forms a dense chemically resistant passive layer of chromium oxide protecting the surface of the component against corrosion. The passive layer usually forms again after abrasion. The pre-conclition to corrosion resistance and passive layer is a metallically pure surface with a high percentage of chromium.

Every mechanical treatment damages the top layer of components i.e.
• Contamination with ferritic matter
• Change in the structure of the layers
• Development of inbuilt stress
• Recluction of chromium content

Heat treatment like annealing ancl welcling leads to scaling and discolouration. This not only deteriorates the appearance of the component but also its corrosion resistance due to the presence of ferric oxides. A continuous passive layer of chromium oxide cannot form here. Hence it is a must to have a metallically clean and pure surface by pickling prior to passivation.

Corrosive stain on insufficiently passivated stainless steel leads to the following:
• Pitting corrosion,
• Crevice corrosion,
• Stress corrosion cracking,
• Intercrysta Iline corrosion ancl,
• Corrosion resulting from contact with foreign metals.

A dense passive layer con only form on metollicolly pure surfaces. Professionally pickled passivated stainless steel surfaces and welded seams:
• Are metallically pure, free of scales and discolouration
• Give the full corrosion resistance to the component
• Have a decorative metallic appearance