Mechanism

Adding lignosulphonic acid to organic acids clearly reduces the corrosion compared to pure acids.

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Reduced corrosion with SoftAcid

The high molecular weight lignosulphonic acid will not penetrate skin. Thus it will also form a barrier on skin.

 

Lignin Molecule

Figure 1: Lignin Molecule

Macromolecular Lignosulphonic Acid

Figure 2: Macromolecular Lignosulphonic Acid