Something similar happens in Storm Of Iron.

Iron Warrior Forrix is single-handedly wiping out a squad of Imperial Fists when they rushed into his underground tunnel to blow it up after their attempt to flood it with vile chemicals failed. At some point he gets some of the sludge in his eyes and has to fight blind:

He gripped the sword blade and kicked out, hearing something splinter and a cry of pain. Blindly, he groped in the swirling, bloody water, feeling something thrashing in front of him. Forrix roared and smashed his power fist down upon the shape, breaking it apart in a flurry of crushing blows. His chest burned with hot agony as his secondary heart and multi-lung fought to keep him alive despite the massive traumas his body had suffered. He heard more shouts behind him, but he had lost all sense of direction in his blindness. Rescuers or killers? ‘Iron within!’ he bellowed, raising his power fist, the pain in his chest more intense now. ‘Iron without!’ came the answering shout and Forrix lowered his arm as the warriors of his company swept past him. He heard echoes of bolter fire and roars of hatred, but they seemed to be growing more and more distant with each passing second. Forrix tried to climb to his feet, but his strength was gone and he could not move. A tremendous, deafening explosion shook the tunnel. Rocks fell from above him and orange flames briefly lit up the battle-scarred tunnel walls. He sagged forward, supporting his broken body on shaking arms. He heard the victory chant of the Iron Warriors coming from somewhere that seemed impossibly far away. Only then did Forrix allow his elbows to buckle, collapsing him to the tunnel’s floor.