add_action run for the specific page

Question

Hi I have faced a problem on my code. I wanted to run add_action for the certain page. add_action is working individually when I Put this on the functions.php but when I tried to run this in wp_head action then its not working.

add_action( 'wp_head', 'remove_my_action', 0);

function remove_my_action($post) {
    global $post;
    $post_id = $post->ID;
    if (512 == $post_id) {
        echo "Page Found";
        remove_action( 'woocommerce_add_to_cart', 'add_product_to_cart');
    }else{
        add_action('woocommerce_add_to_cart', 'add_product_to_cart');
    }
}